I meant game updates in general more than BC2 updates specifically - from WoW patches to Battlefield. Messing with the servers often causes follow on issues. It's all just a guess though so it could be anything.
As for posts about it yes - I tried to play yesterday and got a "Connection Error" (not this one, just "Connection Error" with no other text) and the top item on https://help.ea.com/ was something like "Server maintence 8 April - Affects multiple titles". Right where it now says "EA Online Services Scheduled Maintenance on April 11th, Eastern Time". It mentioned that most games (except BF3) would be offline for 10 or so hours yesterday.
There wasn't any in-game warning before hand though. It didn't even says "Cannot connect - servers off-line for scheduled maintenance" or anything helpful when they were down, just "Connection Error". For all I know they're still just offline because of that and haven't ever come back.