I just discovered a new blog. http://bendoeslife.tumblr.com/
There was a link to a youtube video on Runners World, so I had a look. It was about a guy who was morbidly obese and depressed, and one day decided to start running. He ended up losing 120 pounds (54.5kgs) and and ran races, marathons, and even an Ironman. There was a link to his blog, and I've been reading it all afternoon.
I just read the bit about completing the Ironman, and got a little teary. I feel SO inspired right now!
I also bought the shirt.