Library 2.0

UF Libraries now has a Library 2.0 Working Group and we’re investigating what Web 2.0 apps/concepts best map to libraries. Our wiki will hold our notes and progress, so it may be helpful to others. Of course, our use of any technology is directly in relation to our current systems – how we work, what we have, what we most need – so it also may not be useful as other than a case study. At any rate, it’s very interesting and useful for us.  Plus I get to chair the committee, so I’m sure I’ll be thinking and asking about all sorts of random weirdness.
What are the best technology-related tools for libraries?