You'd think that when battling Nazis in MOH: Airborne you wouldn't be rudely taken out of your suspension of disbelief by notification of an Xbox Live update, but alas, that is how it happened. I bet the Allied troops never had to deal with such distractions.
The update is just a quick little download that prepares your Xbox 360 for the Big Button Pad peripheral. Wow. Exciting.
To learn more about this check out Major Nelson.