I didn't even have to check, mine started doing the second update on it's own. I cancelled it mid-download after reading the other posts. Watch the phone carefully for a few minutes after the first update so it won't do it automatically.
This is going to result in an epic amount of bricked phones coming back today/tomorrow/ect. I can't believe they don't pull the update from the servers and fix the issue right this second! They are undoubtedly getting calls by now...
[><] Deo Vindice [><]