Sister Diane from Craftypod leads a class on Social Marketing. It's almost 2 hours long so grab a cup of coffee or cocoa and sit back to watch, it's full of great information on using social media tools like Twitter, blogs, and Facebook. She explains it in pretty straightforward non-technical language.
Social Marketing for Handmade Businesses by Sister Diane from I Heart Art: Portland on Vimeo.
Note: The video is pretty high quality so run it fullscreen if you can to see the presentation screen better.