I've never been a Walden student, but I've heard good things from their students. I don't remember hearing anything from their instructors, so I hope you get a response, that would be interesting to know.
Positions to teach education, especially online, can be fiercely competitive. Are you also applying to other schools? I gather that even for people with solid resumes that it's something of a numbers game.
-=Steve=-
B.S., Info Sys, Charter Oak State College
M.A., Educational Tech Leadership, George Washington University
Doctor of Health Education, A.T. Still University, in progress