I'll be doing the Muncie half Ironman in July.

I have used the training plans in Matt Fitzgerald's book
"Triathlete Magazine's Essential Week-by-Week Training Guide: Plans,
Scheduling Tips, and Workout Goals for Triathletes of All Levels"

http://www.amazon.com/Triathlete-Magazines-Essential-Week-Training/dp/0446696765\
/ref=sr_1_7?ie=UTF8&s=books&qid=1241661989&sr=1-7

I like that it has different levels of plans for all distance races so
you can find a plan that fits your lifestyle and fitness level.
I've successfully used his plans for Steelhead for 2 years and my
first Ironman race last year. I felt more prepared using these plans
than I did using Gale Bernhardt's beginner half iron plan for my first
half.

Mia