For me, this is the must-attend event of the year relating to Free and Open Source Software in K-12 education. There are more tracks and topics that I already want to see than I will have time to attend. There are currently over 55 planned conference sessions, covering a the use of Linux and Open Source use in classroom, teaching, technical, and leadership aspects.
The event is October 9-11, 2007, in Indianapolis, Indiana. Sounds like a great event.