Suddenly started getting errors in System Prefs/Mobile me.
Account Status: An error was returned from the server. Please try again later.
Sync: Never Synchronized (and doesn't show registered computers).
iDisk: Problem connecting to iDisk server at this time.

So I logged out and couldn't log back in. Invalid Name or password.

Looked on Apple Discussions and threw away tons of stuff in Keychain and turned off Little Snitch.

Was able to log in, but the errors remain.
I let iDisk sync, but won't let me register my computer.