I think we're stuck at v4.5.0.131, at least regarding an official OS from Sprint. I think you might find a .2## somewhere in the forums... But it be skethcy to use an "unofficial" OS from a provider, although others haven't had a problem.
Personally: I aint worried about this, more concerned about jumping carriers to get the Storm2.
Good luck!
Posted from my CrackBerry at wapforums.crackberry.com
Verizon released .138(sucks) and Alltel released .169 today. If you are only looking for official stuff, OS Sprint's .131 is the latest and better than Verizon's .138 actually. Waiting on 169 feedback. If you aren't looking for official stuff there are a couple of good hybrids for the 8330 in the OS forum. Just follow the directions at the top of the sticky in those threads. My curve runs so much better on the hybrid.