Working updated? As in the latest Firmware Thats a No. It's currently not possible and it probably wont be for a long time. Regardless of what people tell you lol. But if you are talking about 3.55 firmware you can find about every custom firmware on this site. The best tutorial in my opinion even though i concider it common sense. Itskamel on Ps3hax.net Hope this helps i suppose.

Aaahhh F....i was hoping there was a way to jailbreak the phat models at least