Awesome steal dude! That's insane LOL
Get some stuff off the network first and foremost ^_^ You can get some cheap AMAZING games.
Get...
SuperStardust HD, the whole pack :P
Pixeljunk Monsters
Pixeljunk Eden
Wild Arms (it works on PSP as well :D)
Castlevania SOTN (works on PSP)
Wipeout HD
In fact, I think you can get all of that for around the purchase of a new disc format game :P
On disc however, you have much to pick up :)
Do get Uncharted, Ratchet and Clank, Resistance 2, Warhawk!!! $9 on amazon!, and hell... just a ton of stuff xD
Edit. And by USB keyboard, surely you mean rechargable via USB for your bluetooth keyboard and headset right? :P