Before that step AT&T should let people freely use their "unlimited usage" first and allow apps like Slingplayer or other that kind be streamed over 3G. Thats what they should work on. Its pathetic that they move to faster 3G but still you wont be able use full potential of it because AT&T will s**t on themselves every time when iPhone user in US will open bandwidth hungry app.
Oh yeah....that makes a lot of sense (sarcasm)...allow these bandwidth intensive applications to chew up the network BEFORE you upgrade the network. HELLO?!?!? Think!