My friend just got cable internet, and we want to play a 2 player
cooperative game. Anyone have any suggestion on good games ? War games would be nice. We are playing ghost recon
now, but what else is there ?

Co-op games? If you like "hack and slash," you could try Diablo 2, Dungeon Siege, or Neverwinter Nights.

The Rainbow 6 games. Rainbow 6, Rogue Spear, Ghost Recon, Sum of All Fears, Raven Shied...it's all good.

I like team-based shooters. I play Unreal Tournament still (as do many thousands of other people) and Tribes 2. When I want to turn my brain off and just shoot, I start up Serious Sam. I'm looking forward to the PC version of Halo.

Serious Sam is very cheap, 4.99 for the first encounter, and Serious Sam Second is only 8.99. You can play the single player co-op, lots of fun

hexen was one of the best co-op games I ever played.