Westmont Public Library in Illinois has (as far as I know) just pioneered an innovative way for libraries to use Flickr.
Someone over there is thinking. They’re publishing photos of new released books with notes attached to each book that link back to reserve that book on their website. Awesome.
Another great use of Flickr notes that I can remember seeing was this one featuring a lot of web 2.0 logos and notes linking to the relevant website. Any others you know of?