I want to thank Jerry for his post and add a few things.
The Education Writers Association is doing an Education Election blog with regular updates.
Teacherken at the Education Policy Blog and the dailykos has posts up on Obama, Richardson and Edwards education statements. They are worth reading in full, but the titles give some idea:
Obama on education – decent, not spectacular
Richardson: education plan & conference call, but really not ready
A very good Education Plan from John Edwards
Thomas J. Mertz
AMPS 
One more from teacherken:
Hillary on Education -some promise but overall incomplete and somewhat disappointing (http://educationpolicyblog.blogspot.com/2007/10/hillary-on-education-some-promise-but.html)