Be sure to check out the K-12 Conference
A description from their site:
"The “K12 Online Conference” is for teachers, administrators and educators around the world interested in the use of Web 2.0 tools in classrooms and professional practice! The 2007 conference is scheduled to be held over two weeks, October 15-19 and October 22-26 of 2007, and will include a preconference keynote during the week of October 8. The conference theme is "Playing with Boundaries." More details are available on the frequently asked questions (FAQ) page."