Ok, this was a useful exercise. Despite my reservations about using Wikipedia (simply for the fact that it is a wiki, and therefor can be edited by anyone), some of these wikis are really cool. Right after I graduated from library school, I volunteered at a school for autistic children that couldn't afford a paid librarian. They had a room and some books, and that was about it. I could have used some of these websites then, particularly the ones that provide cataloging info!