Ghost Recon 2 was sadly cancelled for the PC. I played it on the xbox and its rubbish compared to the first. Yes GR3 will be on PC, apparantly.
Quote from ubisoft on the 12/4/2005
"With the launch of Ghost Recon 3 planned for Winter 2005, significant human resources were needed to ensure the quality of the future instalment of the series, thus potentially jeopardizing the quality of either Ghost Recon 2 PC or Ghost Recon 3. Taking into account their close release dates, and the fact that we felt the third opus would be a much more satisfying and evolved gaming experience, we were forced to conclude that it was in the interest of gamers for us to cancel the PC version of Ghost Recon 2."