OnLive is a cloud game streaming service that has been on the horizon for a while now. The service has been tested a few times and frequently suffered from lag according to some reviews. The OnLive service went live for the first time yesterday.
OnLive is offering what it calls the Founding Members program in cooperation with AT&T. If you head over to OnLive you can sign up for the founding members program, assuming there are any spots left.
Those chosen for the Founding Members program will get a free year of OnLive service and the option to get a second year at $4.95 per month on a month-to-month plan. OnLive will offer over 20 games to start with including Assassin's Creed, Mass Effect 2, and a bunch more. I tried to sign up, but all I got after entering my info was a page telling me they would notify me if selected.