same for me....
Logged in as in the bottom left is blank as well... it just says "logged in as"... i played last night just fine, between 1 and 3AM PST. My friend who I play with was able to log on and see games. Using Vista, just installed updates. Its not my internet since it has remained the same since last night.
relaunched game... after restarting comp and trying a couple times... and it works... server must have restarted or something.