A Library Web 2.0 POLL

Just out of curiousity-what Web 2.0 technologies are your libraries (or companies) using?  Are there some you would like to see being used?  Are there some that are being used that really shouldn't be?
For my library, we are using MySpace, and Flickr.  We should be using Facebook or possibly a wiki.  I don't think we should be using the MySpace as that is not where our patrons are at.