It looks like the reports of AT&T offering free Wi-Fi at their hotspots were not unfounded. Above you can see a new 'Included Feature' that AT&T is bundling with all their iPhone plans. Along with long distance calling, visual voicemail, call forwarding, 3-way calling and Caller ID you now get 'Access to AT&T Wi-Fi hotspots.' Not too shabby at all.
Update: And like that it is gone! AT&T really needs to get their story straight on this one.