I picked up a 2009 Jetta TDI wagon. A nice size cargo area, and I am currently getting a bit over 37MPG (US) on my hilly commute. Best tank I've gotten was 42.7MPG on a relatively flat, all-highway run.

This is with the DSG automatic. Definitely not too shabby. The TDI has tons more power than a Prius and handles really well. Too bad there's no black smoke of death coming out the tailpipe. That's something I miss from my Benz diesel.