So GMail went down at 0130AM Pacific Time. The announcement has been posted on their support page only. No reference of the down time has been posted on the GMail Blog as of yet.
Even though the statement on the support page says that it went down at 0130AM PT, I noticed that the mail interface stopped loading around 10:00ET last night. I hope that they get it back up fast.
PS: As of 0730 ET, GMail seems to be working again.