It seems Google’s Gmail service has been offline, slow and/or reporting 502 errors for several hours in many different countries around the world.
From the BBC article:
Professional users of Google mail are covered by a service level agreement that promises to be 99.9% operational in any calendar month.
I guess that just shows how much SLAs are really worth. But Gmail does still maintain that it is a ‘Beta’ product. This just proves it.
Here’s another article from VentureBeat.
And one from Father Roderick with some useful tips on how to cope.
Personally, I experienced two 502 errors and then it came good… slowly and still sans-chat.