Who's allowed in the sandbox?

The idea of the library using a wiki sounds good to me. But why not draw on the expertise of the patrons? Like in AV, you could start a wiki for favorite horror films. The staff could start it, but when a patron talks about one of his favorites, why not invite him to add an entry onto the wiki? You could create a "user-generated" list of patrons' favorites and use this as one of many resources to other people who like that genre. Probably a pie-in-the-sky idea, but turtles are dreamers, baby.