It takes about 2 weeks for the PSN to test and approve a client build before it is released on Live. There was a Test server build on 2/5 that may have already been submitted.
And 57 should have been released by now? Thought it already had, but then again, usually don't pay attention to updates and patches unless someone whines about them
Huh. 57 doesn't appear to have been released....but it looks like it contains changes to the latest episode.