don't know much about multiplayer...but there's this interesting tidbid that was discussed about SMG1 and SMG2

if you notice the stars on the title cover, it fall onto certain letters

for SMG1: it falls on
I AM MR GAY

for SMG 2:
U R MIA Y (U are Missing In Action, why?)
in backwards:
YA I M R U (Yeah, I am, are you?)

pretty cool, right?
click on the pic paige posted and see where the stars fall on and you'll get what i mean...=)