The Danbury Public Library has added LibraryThing for Libraries to its OPAC as reported on The Thingology Blog.
It's an interesting article that descibes both the positives and negatives og the experience. Tagging is described in some detail. The tag browser does take a long time to load- but, according to the posting, they are aware of the issue and working on it.
One question I have on tags is why they are formatted the way they are (ie. different fonts, weights, sizes, etc)? Where is that controlled? Guess I'll have to look it up.