More info (includes wager mode types)

Dunno if u guys know but this paragraph stood out to me...

Players will have a lot more reason to mess about with customising their player. Treyarch has incorporated a Battlefield-style level of stat tracking in the game via a “player card”. Players can access “heatmaps” specific to their body (showing where they’re most being shot) as well as by map - indicating where kills are being made.

More here:

http://games.on.net/article/10089/Hands-on_Black_Ops_Multiplayer_Los_Angeles_Event

That sounds cool. So you know where you're most likely to die on certain maps etc