I just found via my favorite heads-up publication, ALDirect, the weekly zine from ALA, an ed tech blog which bears paying attention to.
It's called The Power of Educational Technology and is written by Liz B. Davis, a teacher at a private school outside of Boston.
Ms. Davis is also the author of a self-published book called 21st Century Technology Tools, a collection of tutorials on Web 2.0 technology tools such as Google Docs, Google Reader, Wikispaces, Ning, VoiceThread, Twitter, Flickr, Diigo and Delicious. It can be downloaded from Lulu for $0.99.
Take a look.