Yeah, I'm in the crowd that's upgrading because I've got a 3GS that's on its last legs. I've been putting off getting repairs to a badly-cracked case because I've been holding out for the 5. If I hold it the wrong way then it'll turn off or restart. Honestly I didn't take good care of it, and it was a few drops on concrete that finally busted it.
This time around, I'm going to get one of these cases (once they release a iphone 5 model):
https://www.lunatik.com/products/taktik