Wiki in Hawaiian means fast. (Ukulele in Hawaiian means jumping flea.)
Probably because of Wikipedia I tend to think of a wiki as an encyclopedia-type site. Some of the library sites I looked at seem closer to blogs. Probably not a big difference.
The Bull Run Library wiki is a good example of a problem: It looks like an official library site, with a heading consisting of photos of interiors of the branch library (it's part of Prince William County (VA) Public Library system), but under "About this website" is the statement "This wiki is not sponsored by nor associated with the library system. It is maintained by one library patron." That perhaps explains a later statement under the same heading: "If this wiki does not meet with your expectations, please feel free not to use it." So much for the image of a friendly librarian. With friends like that, do we need enemies?
23 Things 16 & 17