The bike course changed in 2012 for Ironman CDA. This post has a link to the GPX file that I created from my Garmin data. You can use Google Earth or other gpx viewers to open it.
For me, the hardest part about this course were the mountains. The climbs are 2-3 miles in length and up to 3% grade. I realized that for many, this is easy, but for us Florida flat-landers, not so much!
Despite the climbs, I am looking forward to doing IM CDA again this year!