I was trying to check (ie. refresh) my uk based google mailbox (gmail/googlemail in uk) and all I get is a 502 Server Error. It seems gmail.com generally is not responding, although pings are going through.
The server encountered a temporary error and could not complete your request.
Please try again in 30 seconds.
UPDATE (1 Sep. 2009 @ 21:41):
Google has us updated here (note IMAP and POP work!!!):http://www.google.com/appsstatus#rm=1&di=1&hl=en