HTC will go for the sprints as their main priority. Tony Martin will be their "GC guy", but I don't see him making the top 20. He'll finish second to Cancellara in the ITT's.
Leopard-Trek seem pretty good. Basically the same team that Saxo-Bank had last year. And with both Andy and Frank working together, it should be something to watch.
Radioshack, form-wise, they should go with Kloden as their main leader. Forget making Levi a leader. In my opinion, it should be Kloden, Horner, Brakjovic, then Levi. And they will surely be a threat in the TTT.
Garmin, I think this year they're going to be focusing on sprints this year. They've landed top 10 spots in the past years but have come short on stage wins. Especially now with the Thor and Tyler duo, it seems like sprints will be their priority and have the same outlook on the Tour like HTC. They go in with two leaders for GC. Also Tommy D wants to land a spot on their tour roster but I think it wouldn't be so good to send him. If Garmin wants extra support in the mountains, they should send Dan Martin.