Got the link to work in the TCCL wiki.
As for library uses of wikis, lists or discussions of books would be good, as would a community events page, to which anyone could add. It might be a good idea for entries to be monitored, mostly to keep some overzealous people from censoring those with opposing views. Or at the very least, have the log of changes up front and easy to get to, so that deletions don't truly disappear.
And check out Mary Poppins at your favorite library. It's a terrific piece of cinemagraphic art.