I have a PS3, but have not yet played online. Current title list...
Oblivion (loved it on 360 which died AGAIN causing me to buy PS3)
Fight Night Round 3
For BR content, I have the Resident Evil trilogy (hmm, Mira!), and the Planet Earth series. I CANNOT overstate how ****ing BEAUTIFUL this ****ing series is. Absolutley incredible. If you ask me, Planet Earth ALONE is worth buying a PS3 or any other BR player.