A reader just sent me a link to servodatabase.com, which lists RC servo specifications and provides user reviews, a comparison engine, and various forms of sorting. Looks like a very good resource. [Thanks, Phil!]
I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.