ON24 Inc. and ACT Teleconferencing Announce Reseller Partnership

Strategic Partnership with ACT Includes Reselling ON24 Webcasting Solutions to ACT's International Customers


DENVER and SAN FRANCISCO, Dec. 18, 2006 (PRIME NEWSWIRE) -- ON24 Inc., the global leader in webcasting and video communications solutions, today announced a reseller partnership with ACT Teleconferencing, Inc. (OCTBB:ACTT), a worldwide provider of audio, video and web-based conferencing products. This partnership enables ACT to provide its global customer base with a media rich, state-of-the-art platform for producing and implementing interactive webcasts regardless of geographic location.

Under the terms of this agreement, ACT will resell and support ON24's Webcast Center and ON24 Podcasting solutions to its customers in North America, Europe and Asia-Pacific under ACT's ConferenceCast brand. Furthermore, both companies will collaborate on future product and service synergies, providing customers with the latest conferencing and webcasting products and services.

"In our partnership with ON24, we are collaborating with an industry leader who continually innovates new products and solutions," said Gene Warren, President and Chief Executive Officer of ACT Teleconferencing. "ON24's breadth of solutions and presence in North America, Europe and Asia-Pac enables us to provide state-of-the-art technology that meets our customers' needs."

"Our collaboration with ACT complements our global agenda to provide a full suite of webcasting and video communications solutions for our customers," stated Sharat Sharan, President and CEO of ON24 Inc. "In combination with our robust technology platform, our customers can leverage ON24 services to develop and execute strategic initiatives worldwide."

ON24 provides a full suite of webcasting and video communications solutions to meet corporate and marketing initiatives, such as lead generation, corporate announcements, webinars and more. Marketed under the ConferenceCast brand, ACT will resell ON24 Webcast Center, a reliable and scalable web-based platform to quickly schedule, rehearse, produce and deliver interactive audio or video webcasts to audiences of hundreds or thousands. Webcast Center incorporates ON24's powerful reporting capability to analyze and measure the impact of webcasts. Combined with ON24 Podcasts, ON24 Webcast Center enables customers to convert live and on-demand webcasts into podcasts or to produce standalone podcasts for corporate and marketing initiatives.

About ACT Teleconferencing

Established in 1990, ACT Teleconferencing, Inc. is a leading independent worldwide provider of audio, video and web-based conferencing products and services to corporations, educational organizations and governments worldwide. ACT's integrated global audio and video conferencing platforms provide uniform international services, customized uniform billing, managed services and local language services. The Company's headquarters are located in Denver, Colorado with operations in Australia, Belgium, Canada, France, Germany, Hong Kong, Singapore, the U.K. and the U.S., with several virtual locations, including Japan, China, Taiwan, Indonesia, Spain, Sweden, Switzerland, Russia, Poland and South Africa.

ACT Forward Looking Statements

Matters discussed in this release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements relate to future events or our future financial performance. In some cases, you can identify forward-looking statements by terminology such as may, should, expect, plan, intend, anticipate, believe, estimate, predict, potential or continue, the negative of such terms, or other comparable terminology. These statements are only predictions. Actual events or results may differ materially from the events or results indicated in any forward-looking statements. In evaluating these statements, you should specifically consider various factors, including the "Risk Factors" included in our Form 10-KSB filed for the year ended December 31, 2005.

About ON24 Inc.

ON24 Inc. is the global leader of webcasting and video communications solutions. ON24's solutions provides companies a full range of applications and services to meet corporate and marketing initiatives such as lead generation, conferences and events, product launches, continuing professional education, internal communications, and executive announcements.

More than 500 global organizations in publishing, technology, life sciences, government, and financial services rely on ON24, including Cardinal Health, Cisco Systems, Motorola, CMP Media, Credit Suisse, Department of Education, Hewlett-Packard, IDG, National Science Foundation, and Samsung. ON24 is headquartered in San Francisco, with offices in Washington, D.C., New York and London.

"A World of Webcasting Solutions. One Webcasting Provider"(tm) - is a trademark of ON24, Inc.


          ACT Teleconferencing, Inc.
          Liza Kaiser, IR/Corporate Communications Manager
          (303) 233-3500
          lkaiser@acttel.com

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