Best keepers around for 06 are:
Italy's Buffon! GIGI!!!
The Czech's Cech!
Spaniard's Iker! The rest of the team might be crap, but they've got Iker.
Dida's mostly lucky, but neither he nor Julio Cesar are really at the top. Kahn's time is over, and Lehmann or Hildebrandt definitely be Germany's keeper.
The US has Kasey Keller, which is currently the best keeper in CONCACAF, Costa Rica's Porras is also pretty good (I'm Costa Rican

).
Argentina and Netherlands are great teams with not so great keepers.