Yep, we just made topics at the same exact time. I've been waiting 2 hours for mine to activate via the online method, and the activation phone number states that activations are suspended.
I received my iPhone 4 at 1:30 PM. Had no problems activating it. Took 2 minutes.
The online gave me some generic error 3 times in a row, but when I called the number on the flyer AT&T put in the box, it worked fine over the automated phone system.
I was about to head over to my ATT store, but calling the activation number worked fine. Upgraded from a 3GS.
I think I activated successfully, because it went through the steps and then began to restore from backup. It appears the backup was successfully installed, but I am receiving NO SERVICE and when I reboot I am receiving a message that states "Waiting for activation - This may take some time." 😱 Would it have let me restore and etc if it didn't successfully activate??