Is it me or blizzard servers?
BLUE UPDATES ON THE SITUATION:
Apologies for not responding sooner. This is obviously a huge inconvenience for you all, and it's being looked into at the moment. I'll keep you updated via this thread as more information becomes available.
We are aware that our login servers are having some problems right now and are working hard on getting them back up so you guys can play again as soon as possible.
We have updated the in-client breaking news and will continue to provide updates on the situation here and on our CS Twitter feeds (http://www.twitter.com/BlizzardCSEU_EN).
We apologise to all affected by this problem this morning.
These issues are also affecting StarCraft II and the Mobile Armory. Our technicians are on-site and working hard.
I have copied all blue responses on the situation to Glynny's original post in this thread (thanks Glynny!) for easier visibility and will continue to do so until the issue is resolved and we can close this thread down.
Once again we apologise for interrupting your fun in this manner and thank you all for your patience.
Our technicians have now identified the most likely cause of the issue and are now working on fixing it.
It appears that the issue is quite severe and it may be several hours before you are able to login to our games again. If this changes, we will inform you immediately, but in the meantime we are very sorry for the inconvenience this is causing our customers.
As this thread is getting way too spammy to benefit anybody, we will move all of our updates to our new sticky here:
Also, the 'support' page you link us with the error message is blank, but then its always blank, whether you're looking for advice after being hacked or just trying to find out subscription fees, its always blank.