Clay makes the point that Social Media is changing the world. And is changing the world from a grass roots level up.
He is very easy to listen to, and makes some valid points about how social media is far from trivial.
Libary staff learning and developing web skills together.
There are lots of other book/reading tagging (social cataloguing and databases for readers and libraries) tools out there, LibraryThing seems to be the one that is taking off the most, but if you are interested, take a look at: