My data was down most of last night as well. From 7pm to 1am EST. I tried toggling airplane mode, reboot, battery pull, activate app, and no luck. It came back up this morning around 10am. I still have time to return my Optimus since this has been happening to me daily and it seems like virgin mobile doesn't care.
mmarz, I really don't think this number of people in different places would be having the same problem at the same time if it was that...I can't believe we all have broken phones at once.