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Signing into Xbox LIVE from an Xbox console
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From xbox.com.

I logged in fine at my friends... no longer than 20 minutes ago

im haveing the same problem

Every time World at War releases a Map Pack. Sigh.

This is so frustrating. Maybe they should upgrade they're server!!!

Yeah, everyone I know is having this problem.. Thanks for posting this, though.

wow map pack one the point buying died
and map pack two freaking that night if you sent a message the person didnt get it
map pack three and i cant sign into xbox...

phew i'm not the only one having this problem all of a sudden