I think any way you look at it, they have as good a chance as ever to win the DC this year now...provided Tomas keeps his form like you said, and Steps doesn't suck when he comes back (or actually comes back at all). Good chance against Serbia because Djokovic would feel massive pressure to win both his matches considering Tomas and Radek should be able to beat Tipsarevic or Troicki pretty easy (unless they go braindead).
But yea I was thinking the other day - Tomtom has proved himsel on every surface now, so unless he, like Dave says goes braindead, he can challenge on all surfaces and be a threat on all surfaces. So even if the tie is on clay, I iz confident
Or have I just majorly jinxed things