Libraries using a variety of social media

Just from this blog and research and actual social interaction :) I am discovering the importance of social media in libraries today. Check out this link for tips for using social media in libraries, a couple of years old I know but still relevant; And closer to home the State Library website has numerous blogs that can bring clients from many places together, as it invites everyone to participate; There are a great selection of topical blogs enabling great sharing of information... more to come as I search!