SEATTLE, May 19, 2008 - NCTA CABLE SHOW - GridNetworks, a leading provider of managed Internet video delivery services, today announced a collaborative relationship with Comcast Corporation (NASDAQ: CMCSA, CMCSK), the nation's leading provider of entertainment, information and communications, as well as an investment from Comcast Interactive Capital.

GridNetworks provides GridCasting service, as well as licensed technology solutions, for managed Internet video delivery through consumer broadband connections. GridCasting enables HD video for the mass-audience that will deliver a high-quality viewer experience, enhance content monetization, and deliver video in a way that is friendly and efficient on the broadband ISP's network.

"The collaborative discussions with GridNetworks are timely as we are working hard with a number of technology companies, the IETF and other leaders in the field to improve the efficiency of P2P on ISP networks. We are interested in the application of P2P concepts in a manner that puts the quality of the consumer experience first, and enables lawful distribution of copyrighted content while also efficiently utilizing the network," said Tony Werner, Comcast Chief Technology Officer. "GridNetworks has experience in this area and will have valuable contributions as we set out to solve these issues together with the Internet community."

"GridNetworks has built a delivery platform in conjunction with a managed service that can specifically meet the business and technical requirements of both media companies and broadband service providers for SD and HD content," said Tony Naughtin, President and CEO of GridNetworks. "We're excited to contribute to this industry effort."