Here are a few ways they're keeping us updated:
I'm sure there are facebook accounts & other stuff as well. Note the top (at this time) reply on Vonderhaar's twitter feed:
@suckmyturbins First patch that fixes the most common PS3 freeze tomorrow. And we will keep at it.
It was submitted to Sony yesterday, so blame them for having to wait an extra 48 hours & not Treyarch.