Wikis and Professional Development

[Mary Ann Harlan]

I saw on Joyce's poll (pretty by the way) that most of the respondents (not a high number I know) posted that Wikis are the killer app for a teacher librarian. I am working on something in regards to professional development and personal learning networks right now and I was wondering if any wiki aficionado has experience with using wikis to expand their personal learning network, or uses one for the own professional learning? I'm not much of a wiki user myself so it is a tool I leave out of my own PLN. What about you? I'd love some user feedback, fresh ideas, and wiki soapboxing.