I'd hold off. I just did the update and my phone is now stuck in the emergency dial mode. iTunes keeps telling me it can't connect to the store when I click on my phone even though I can connect to the store though the store link.
I tried calling my phone and it simply rolls to voicemail, I don't get a signal currently on the phone. My guess is the systems are all overloaded right now and my first early adopter choice was not a wise one.