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POMPANO BEACH, FL – December 17, 2009 - Onstream Media Corporation ( OTC: ONSM) a leading online service provider of live and on-demand internet video, corporate web communications and content management applications, today announced an agreement with the Tarsus Group plc (London Stock Exchange: TRS.L) to implement and market Onstream Media's virtual trade show and social network marketing platform MarketPlace365T to Tarsus Group's more than 19,000 trade shows and 2,000 suppliers that are part of their Trade Show News Network (www.TSNN.com). TSNN is the world's leading online resource for the trade show, exhibition and event industry and the most widely consulted event database on the Internet.

TSNN selected Onstream Media's MarketPlace365 solution, which will be officially launched in January 2010, after an extensive due diligence and review effort to compare similar applications on the market. TSNN plans to establish a virtual trade show marketplace for its broad base of customers, many of whom are expected to establish their own virtual marketplaces for their respective industries, utilizing Onstream's MarketPlace365 platform.

"After reviewing Onstream Media's MarketPlace365 platform, we quickly determined this solution was exactly what we were looking for to create an additional revenue stream that's perfectly aligned with our existing business model," said RD Whitney, CEO of Tarsus Online Media USA/TSNN.com. Mr. Whitney continued, "And better yet, the solution comes pre-packaged with an array of powerful marketing and SEO features that can be implemented quickly with minimal upfront costs and essentially no IT resources required."

Onstream's MarketPlace365 is a lead generation, social media marketing, and comprehensive communications platform that enables publishers, associations, trade show promoters and established entrepreneurs to self deploy and manage their own profitable virtual online marketplaces. In addition, MarketPlace365 integrates many of the company's advanced digital media applications including webcasting, web conferencing, archiving, transcoding, user generated video, customized players, video advertising, secure streaming, content syndication, pay-per-view and more.

Virtual trade shows are quickly emerging as a next generation platform that will take sales, marketing and communications to a whole new level. Businesses are looking for more efficient, cost-effective and "green" solutions that can not only capture viable leads, but also create a better online experience that leads to higher engagement and sense of community - all in a more socially responsible and environmentally-friendly manner that reduces a company's energy consumption and carbon footprint.

Randy Selman, President and CEO of Onstream Media stated, "MarketPlace365 combines the best elements of web-based lead generation to drive more awareness and business for respective brands at a lower cost and in a more measureable way that better quantifies their ROI." Mr. Selman further commented, "Virtual trade shows are poised to have a 'breakout' year in 2010 and we're pleased to be at the forefront of this emerging market with both a comprehensive and cost-effective platform, which has now been selected by the leading online resource supplier in the trade show industry, TSNN."

About Tarsus Group & TSNN.com:
Tarsus Group plc (London Stock Exchange: TRS.L) is an international media company with a portfolio of exhibitions, conferences, publications and online media that span across the Americas, Europe, Asia and the Middle East. With its head office in London, Tarsus also has offices in Paris (France), Milwaukee and Boca Raton (USA), Düsseldorf (Germany), Shanghai (China) and Dubai (UAE). Tarsus Group owns the Trade Show News Network (TSNN), which is the world's leading online resource for the trade show, exhibition and event industry since 1996.

In addition, TSNN owns and operates the most widely consulted event database on the Internet, containing data about more than 19,000 trade shows, exhibitions, public events and conferences. TSNN.com helps to facilitate the exchange between buyers and sellers to achieve a successful venture, with over 137,000 registered website users, over 35,000 bi-monthly newsletter subscribers and over 2,300 LinkedIn group members. For more information about TSNN, visit www.tsnn.com.

About Onstream Media:

Onstream Media Corporation ( OTC: ONSM) is an online service provider of live and on-demand internet video, corporate web communications and content management applications. Onstream Media's pioneering Digital Media Services Platform (DMSP) provides customers with cost effective tools for encoding, managing, indexing, and publishing content via the Internet. The DMSP provides our clients with intelligent delivery and syndication of video advertising, streaming video, mobile streaming and supports pay-per-view for online video and other rich media assets. The DMSP also provides an efficient workflow for transcoding and publishing user- generated content in combination with social networks and online video classifieds, utilizing Onstream Media's Auction VideoT (patent pending) technology. In addition, Onstream Media provides live and on-demand webcasting, webinars, web and audio conferencing services. In fact, almost half of the Fortune 1000 companies and 78% of the Fortune 100 CEOs and CFOs have used Onstream Media's services.

Select Onstream Media customers include: AAA, Bonnier Corporation, Dell, Disney, Georgetown University, National Press Club, PR Newswire, Shareholder.com (NASDAQ), Sony Pictures and the U.S. Government. Onstream Media's strategic relationships include Akamai, Adobe, BT Conferencing, eBay and Qwest. For more information, visit Onstream Media at http://www.onstreammedia.com or call 954-917-6655.

Onstream Media:
Chris Faust
FastLane Communications

Investor Relations:
Brett Maas
Hayden IR

Cautionary Note Regarding Forward Looking Statements

Certain statements in this document and elsewhere by Onstream Media are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. Such information includes, without limitation, the business outlook, assessment of market conditions, anticipated financial and operating results, strategies, future plans, contingencies and contemplated transactions of the company. Such forward-looking statements are not guarantees of future performance and are subject to known and unknown risks, uncertainties and other factors which may cause or contribute to actual results of company operations, or the performance or achievements of the company or industry results, to differ materially from those expressed, or implied by the forward-looking statements. In addition to any such risks, uncertainties and other factors discussed elsewhere herein, risks, uncertainties and other factors that could cause or contribute to actual results differing materially from those expressed or implied for the forward- looking statements include, but are not limited to fluctuations in demand; changes to economic growth in the U.S. economy; government policies and regulations, including, but not limited to those affecting the Internet. Onstream Media undertakes no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise. Actual results, performance or achievements could differ materially from those anticipated in such forward-looking statements as a result of certain factors, including those set forth in Onstream Media Corporation's filings with the Securities and Exchange Commission.