So, I am sitting at my local Starbucks and decided to give the new AT&T free Wi-Fi a spin on my iPhone 3G. The process was painless. After turning on Wi-Fi, you are presented with a screen to enter you phone number. Afterwards, it tells you that you are receiving a link via text (for free) with a link to access AT&T's free Wi-Fi.
I have to admit, at first I was thinking that this seems a little complicated and a lot of steps to just connect via Wi-Fi... but wait, it is all-goooooood.