The PC version of Grand Theft Auto IV, which releases next week on December 2nd, will bump the player count in multiplayer up to 32. The console versions were limited to 16 players online.
There is, however, talk that this increase in players will only be for certain modes including Team Deathmatch and GTA Race.
The PC version is currently available for pre-loading on Valve's Steam service.
Are you getting the PC version of Grand Theft Auto IV?