PS3 firmware 3.0, apparently. That's what PlayStation Network operations director Eric Lempel said, and he should know. He is the PlayStation Network operations director.
"You know, I wouldn't say that or sure just yet because we are working on some things," Lempel told G4. "But this is a big and significant update, so you would be correct to assume that [it's the last major update for 2009]."
Don't surprised if there are smaller firmware updates, and heck, don't even be surprised if there's another big firmware update. Just don't be surprised. Be happy.