PSN really isn't on the same level of service as XBox Live, though. A lot of features(both for end users and developers) aren't included in PSN that come stand

PSN really isn't on the same level of service as XBox Live, though. A lot of features(both for end users and developers) aren't included in PSN that come standard with the 360's SDK. This includes things like cross-game voice chat(free for one on one communication, pay for a larger party on the 360), system-level friends list integration(free), and matchmaking(technically a pay service). None of that is included with PSN, but is present in Live, which means that the individual developers are generally left to implement those features for the PS3.