I finished the campaign on Heroic. When you fiinsh you unlock a new multiplayer map. Well, assuming you do some goofy trick to actually unlock it. The new map is called Foundation. It's a very small, circular map... pretty blah, really, but at least it's something.
Started playing more multiplayer on Live, which is pretty cool. Level 1 games are pretty silly.. people suck so bad. But after you start moving up, the challenge level becomes very appropriate. The matchmaking is pretty good. Still has the long wait time bug though, unfortunately.