I think the day of the hybrid is about over. You have a new crop of fuel efficient vehicles coming form U.S. manufacturers. For example, the 2011 Chevy Cruz will get about 41 mpg. The Prius only get about 45 mpg. The Cruz will be larger and better looking than the Prius, and you won't pay a premium for the hybrid system.
Then, you have electric vehicles coming, which again, will be more cost effective and more efficient than hybrids.
If I had a hybrid, I would be getting rid of it now, or plan to keep it forever.