They're the team that's looked the best so far, I'd put Colombia second. That said, there's plenty of precedent for teams starting out weak and playing themselves into great form throughout the tourney.
If this tournament has taught me anything so far is that there seem to be no favourites. France does look good, but how will they fare against tougher opponents? As for Colombia... Eh, no. I don't see it.
Edit: That being said, I'm still sticking with Germany at least reaching the finals. They may have played a ... less than spectacular game, but I still think they have the metal.