Newtoolsworkshop, a collaboratively built site can serve as an introduction to social media or as a continuing education venue for the more advanced user. Suitable for all ability levels.
Contributions to http://newtoolsworkshop.wikispaces.com are licensed under a Creative Commons Attribution Share-Alike 3.0 License.
This was shared on Bright ideas , a blog by the School Library Association of Victoria (SLAV). This is an extremely active blog which I read almost daily. It is well-worth subscribing to; I discovered it because it was a 1st runner up for the 2009 Edublog Awards: Best Library/Librarian blog.