This might have been mentioned before but a search has turned up with nothing.
What if Sony made PSN (Friends, Trophies, etc.) for the PSP? It would be perfect to be able to see and message friends In-Game. Almost like an XBox Live/Steam deal. And Trophies (Achievements) would be awesome for games like Syphon Filter and the up coming Little Big Planet, MotorStorm.
And if Sony wont make it, do you thing someone in the community could come up with a plugin with the basics mentioned above? (Friends, Messaging?)