Training Plan: Which one did you use and like?

My husband and I are doing IMKY 2009. I have done tris before but its been a few years since I have raced. My husband hasn't done a tri, but we are working on getting a bunch of tris in before the "big one"

I have done a lot of research on IM programs and can't figure out which one to use. I'm looking for free plans (we just got married and trying to save money!). So for those who have done an IM let me know what program you used and the pros and cons.

Thanks in advanced!