Will there be seperate lobbies for those who have map one and those who do not? I have to tell you, it was annoying as hell in WAW when Treyarch made all the map pack maps come up more often, just to blackmail you to find it. 50% of all games joined were "You do not have downloadable content to play this game. Please try again or check your hard drive for erased content." Not to mention 2 of these maps were 'SUPPOSED' in the game in the first place.
Also here's the price per map.
COD4 and WAW PPP: 200 points a map ($2.50)
CODMW2 PPP: 300 points a map ($3.75)
CODBO PPP: 240 points a map ($3.00)