EV Rentals in Los Angeles and So Cal. Couple of places in PHX. (Fox seems to have them in several locations. Have seen "Reports" of Hertz having in some areas. Supposedly, Enterprise has them in Florida and the Southeast. Haven't even found a Google listing for Hybrid rentals in other parts of the country. DC supposedly has the highest ownership, but not sure of any rentals.
Might try over at PriusChat.com to see if anyone there has an idea. Also on the CarTalk Hybrid Board. If you find a listing let me know. I hate non-hybrids after driving one for three years.