Ghost Recon soldiers are frequently tasked with shooting a bunch of bad guys in politically unstable circumstances. You'll be able to accompany them to Sri Lanka in Tom Clancy's Ghost Recon Predator for PSP, and to Norway and Moscow in Tom Clancy's Ghost Recon: No Subtitle for Wii. According to Ubisoft, both games are due this November.
Both promise a "true Ghost Recon experience," which implies technologically advanced weaponry, squad-based combat and probably a suitcase that is also a bomb. Ghost Recon Predator (that's the PSP game) will offer customizable squad mates and three-player ad-hoc multiplayer, while the more action-oriented Wii title promises two-player co-op with drop-in play (Ubisoft describes it more interestingly as "Co-op Hot Join").
The Wii's Ghost Recon seems to be quite a departure from other Tom Clancy games, though Ubisoft stresses that you'll still get "high intensity combat, tactical infiltration and WOW moments." That's probably referring to the exclamation, not the loot spilling out of a terrorist's dead body.