http://www.joystiq.com/2008/06/30/ps3-s-trophy-system-explained/
First off: thank goodness they're not actually called "entitlements." No – Sony has gone simple with its in-game rewards / bragging rights system, settling on the concept of "Trophies" for rewarding players for their ... achievements in games.
We had the opportunity to see exactly how the Trophy system will work, which games will support it, and more nitty-gritty details that you can read about after the break!