Keynote® Introduces New Version of Streaming Perspective With Support for Microsoft Silverlight 2

* Keynote Adds Silverlight 2 to its Extensive Roster of Supported Delivery Technology
* Newest Version of Streaming Perspective Makes its Debut at the 2008 Beijing Olympics
* Upgrade Enables Developers to Test Streaming Video Utilizing Silverlight 2 and Ensure an Exceptional End User Experience

SAN MATEO, CALIF.— Keynote® Systems (Nasdaq: KEYN), the global leader in on-demand mobile and Internet test & measurement solutions for continuously improving the online experience, today introduced a new version of Keynote Streaming Perspective® with support for Microsoft Silverlight 2, the technology powering online streaming video coverage of the 2008 Beijing Olympic Games on NBCOlympics.com on MSN. The upgraded version of Streaming Perspective, the company’s industry leading streaming test and measurement solution, enables developers to test and monitor streaming video that utilizes Silverlight 2 and helps deliver and ensure an exceptional end-user experience.

Microsoft engaged with Keynote prior to the Olympics to utilize the company’s LoadPro® load testing solution. Keynote then worked with Microsoft to incorporate Silverlight 2 into the Streaming Perspective platform and enable Microsoft to continually monitor the performance of 2,200 hours of online streaming video coverage of the Olympics.

“Keynote’s monitoring and benchmarking solutions provide companies the assurance that key metrics are captured and the end user experience is optimal,” said Vik Chaudhary, vice president of product management at Keynote. “Incorporating Microsoft Silverlight 2 support into the Keynote Streaming Perspective platform not only provides a necessary tool for monitoring the Olympics streaming video, but will continue to empower companies with the necessary tools to ensure an exceptional end-user experience.”

“Keynote’s technology for measuring the performance and quality of streaming video is a critical capability particularly as broadband video consumption grows exponentially,” said Rajeev Kutty, product manager for Streaming Perspective. “We have received very positive feedback on our solution from both Microsoft and CCTV, two companies dedicated to assuring the highest performance levels possible during the Olympics.”

Keynote Streaming Perspective is the market-leading service for measuring the quality and reliability of video streams from multiple geographic locations around the world. Using Keynote’s globally distributed network of measurement computers, Streaming Perspective measures the quality and performance of audio and video streams from the end-user perspective.

In order to deliver the most accurate and actionable performance data, Streaming Perspective connects to the selected Internet stream multiple times per hour and records key performance data. All the collected data is then made easily available to customers via the Streaming Perspective portal, making it simple to chart performance and diagnose critical problems as soon as they occur. High-level summary information is available at a glance, while detailed diagnostics data is only a click away.

The Streaming Perspective test and measurement platform contains the most robust support for streaming video players and delivery technologies including: Windows Media, Flash, Real, QuickTime, and now, Silverlight.

Availability and Pricing

Keynote Streaming Perspective is currently available. Pricing starts at $195 monthly. For more information, please visit: www.keynote.com/products/voip_and_streaming/streaming_performance/streaming_perspective.html