Hi there, I'm GeekGirl, and IM CDA will be my 2nd Ironman. I'm hoping to do it just a bit faster than I did Kentucky (DFL) and more comfortably. No, scratch that. I want to just finish it more comfortably. The bike at Kentucky was BRUTAL and I'm not just being melodramatic. I live in the Albuquerque area, and my coach is the Jimmy, and he writes me weekly training plans, phones me at last once a week as well as after every race, and meets with me and his other clients weekly for track/interval workouts that he calls "turbo bricks"
A few people are doing it with me: my Sweet Baboo, of course, and SW Tri Gal, and a few others; some other friends are going as sherpas. We're staying at a cabin near the lake where the swim will be held and will be making this SW Tri Gal found out about this by searching online for cabins that can be rented near the race venue. We're renting the cabin for a week and have already sent our deposit.
So, well, the good news: I've had two people who were at Kentucky tell me that the new bike course at IM-CDA is not as hard as Kentucky (whew!) it definitely has some rollers but it appears to be pretty doable. http://www.nasports.com/compare/comparebike.php
As for the run course, it's clearly a two-loop course with lots of rollers. I actually like this because at least I won't be wearing out one set of muscles on the run. http://www.nasports.com/compare/comparerun.php