An Encyclopedia of Sci-Fi Technology?

RobotWisdom asks: "Is there a wiki somewhere that I haven't found, dedicated to cataloging all the technological innovations imagined by science fiction writers? So that if someone wants to explore a particular class of innovation like weapons, or medical, or transportation, they can (eventually) easily find summaries of all the major thinking on that topic? And if it hasn't been started yet, does anyone have the wherewithal to start it?" If such a thing isn't available in one place, what sites have you found that catalog the technology of specific sci-fi mythologies?