As you may have heard and read, Infinity Ward and Activision has decided to gimp the multiplay part by removing the option of having dedicated servers hosting the online games. They now expect PC players to reverse to a more primitive way of playing online games, basically copying the way consoles handle it with peer 2 peer hosting where a host is both playing and hosting at the same time. For PC players this will mean more lag, less players and a poorer community spirit. Added to this the lack of mod-support and you have a severely gimped game..