No data here again today (except when I'm on Wifi). Have contacted AT&T support, did the usual steps and they're sending me to RIM again. Per AT&T support chat:
<<I have come across this with others today an did refer them to RIM as well. I was hoping this would have been fixed by now as it seems it is something on their end.>>
Anyone know what's happening on RIM's end? I will contact them and I'm sure spend an hour on the phone with them and have them fix it again.