There are a number of projects and courses for learning about Web 2.0. Here are some great resources to use created by educators in Michigan.

http://exploringelementary2.edublogs.org/ Kristin Fontichiaro has been running this Web 2.0 session

http://web2forpd.wikispaces.com/ This was created by Carol Mayer and Jacki Campbell for the MACUL precon in March, 2008

http://resa-23things.blogspot.com/ Wayne RESA's 23 Things Teachers Need to Know About Web 2.0

http://jdorman.wikispaces.com/wikiworkshop This was created by Jennifer Dorman in Pennsylvania and has some fantastic tips and and hints for teachers for integrating Web 2.0 into the classroom