The company I worked for sponsored a contest for people to use this site.
It's a fitness/nutrition site.

I had put back on the weight I had lost when I stopped playing Warcraft because I had too much going on to keep up with things, so I took part in the contest. I found it very helpful to keep track of what I was eating and the excercise routines it suggested were also good.

I've made a group for people from this forum on the site:

http://teams.sparkpeople.com/withoutwarcraft