Should've done this long time ago. I'm UNIT0918 on PSN. Like most people here are saying, write in your friend request that you're from Cosplay.com. Don't be shy to add me!
I usually play Uncharted 2: Among Thieves's mutliplayer, while playing some Metal Gear Online every few weeks. I also have MAG, Killzone 2, LittleBigPlanet, White Knight Chronicles, Mercenaries 2: World in Flames, and Ghostbusters: The Video Game if anyone wants to play together. Hell, even LEGO Star Wars: The Complete Saga too.
'Course, can't forget the PS3's adhocParty feature, which allows you to play PSP adhoc-only games online. If anyone's up for that, I have the NA version of Phantasy Star Portable and the JPN version of Phantasy Star Portable 2. I also have Metal Gear Solid: Portable Ops, Dissidia: Final Fantasy, and Monster Hunter Freedome Unite, but I rarely play those. Also looking forward to using adhocParty for the upcoming Valkyria Chronicles II around this summer.