I agree mate. I thought, when he was at RBR that he was very underrated. He'd taken an unspectacular debut season and built on it very nicely in 05 and most of 06. I think he'd be a good choice for any of the new teams, maybe to build a squad around him as a lead driver. He has nearly 50 GPs experience, and he's very quick. Also he must be good technically as he's been the tester for a top team (BMW).
I think Pedro deserves another shot at a full season, having had one race in 05 and half a season in 06. I think he's still a very fast and intelligent driver who is better than many of the veterans we've had in the last decade.
Liuzzi - same as with Klien. It just depends whether FI would boot out Sutil. Maybe, but if they are going to get rid of Fisi as many people think at the end of the year, Tonio will slot in nicely there, leaving another spot open.
Taku and Ant had the same situation when Super Aguri went under, and are both quick, motivated , intelligent and have a lot of experience.
Di Resta is unproven but we all know he is talented, and we can't rule out anyone who loses their seat this year being considered.
For example if Fisi leaves Force India, I reckon many new teams would hire him to be their team leader, the same goes for Nelsinho if he is booted out of Renault. You never know he might turn his career around with a new squad...