Since I can't get the 4S until December, I'm thinking about it too because I have AT&T. But their not all that bad I guess, unless I go to Sprint, but the in locked version on works on GSM networks, and not CDMA. So I may just upgrade with AT&T, besides I like the ability to talk and do things on the web at the same time. You can't do that anywhere else right, at least in the US.
I have had a change of mind with careful consideration, I think I will go with a White iPhone 4S. I've always had the black version, and I have a White iPad 2, so I think I'll do the White this time.
the white does look really good up close, I thought I was going to hate it especially from the pics of it online but after seing it at the apple store I would not mind owning a white one