Wrap up; social networks & catch up

As an avid Facebook user - love that I've 'found' friends that I haven't seen since I finished school - I can see so many uses for public libraries with social networks. We could set up a page for the library and use it to advertise special collections, new books, reviews, events, storytelling times etc. While social networking works really well for teenagers (an audience that we desperately need to attract BACK to the library) I think that they work really well for the older audience (my generation) of the 20-35 yr old too.