Enforcer
Explorer
TrueSkill is a Live thing, not a game-specific thing. See http://www.xbox.com/en-US/live/features/nextgenmatchmaking.htm It even takes into account what modes of a game you play. "For example, if you're dominant in straight up races in Burnout Revenge™, but struggle a bit more in Crash mode, you'll be matched up against players of appropriate skill for each game mode individually."
Does the PS3 let you rate other players? On Live you can review other players and "Prefer" or "Avoid" them. That's been a great feature for me. For "Avoid" you can even sub-specialize for behavior, player's skill, or player's unfamiliarity with whatever game you're playing. So say I don't like have JoeSchmoe on my Team Fortress 2 team because he has no idea what he's doing (unfamiliarity), I can avoid him for that game, thereby leaving open the option that he's awesome at Call of Duty 4 and good to play with there.
Does the PS3 let you rate other players? On Live you can review other players and "Prefer" or "Avoid" them. That's been a great feature for me. For "Avoid" you can even sub-specialize for behavior, player's skill, or player's unfamiliarity with whatever game you're playing. So say I don't like have JoeSchmoe on my Team Fortress 2 team because he has no idea what he's doing (unfamiliarity), I can avoid him for that game, thereby leaving open the option that he's awesome at Call of Duty 4 and good to play with there.