you might as well wait. if you go to ATT now and Verizon launches the iPhone in the early part of 2011, the you will be stuck with ATT until your contract is up, or pay the early termination fee, then buy the phone all over again on Verizon.

Yes ATT is installing 4G now (LTE) just like everyone else, just not as fast as Verizon. Right now not even Sprint who launched the first US 4G network, can support many customers on 4G. Verizon claims to have 4G available in 30 cities by the end of the year 2010. ATT has not released how many cities it will have 4G coverage by end of 2010, it might be end of 1st quarter 2011 before ATT announces anyting