Honestly, I'm not too keen on a romance between Tony and Ziva either - I ship them like mad, but not only do I not trust NCIS to write that convincingly or in a way that wouldn't screw up the team dynamic, I also think that they'd be a bloody TRAIN-WRECK together.

On the flip side, I doubt they'd actually go there. Tony and Ziva have been VERY shippy this whole season, but then, so were they in season 3.