They are obviously working on a second patch to address these issues with locking up and freezing but i believe that it will take some time before it hits the PSN. I mean, this is hard work and a lot of testing should be done to prevent it to fix these issues and then break another. I for one, sure don′t mind waiting for a good patch.
Don't get me wrong, I really have no problem with shelving the game for a week or two if I knew a patch for these problems was coming. But that's the trouble, they have made no indication that they are actually trying to fix these issues! It wouldn't take 2 minutes to type up a quick post letting us know they are aware of these issues and are trying to fix them.
From what little I have read they are targeting the small, niggly glitches, not the massive gamebreaking ones such as lag/freezing/save corruption.
A quick glance at the Fallout 3 forum doesn't fill me with much hope as that game is still experiencing freezing!
I would place a very large bet on them not fixing New Vegas either.