The Mens Health forum has been hosting a challenge for a couple years now called the 52 Day Challenge.  We are in the process of taking the challenge off of being a "Men's Health Belly Off Club" event only and making it available and easy to use for anyone.  In the past you had to be a forum member to join, and now it's open enrollment.
The next challenge starts March 24th and will run through May 14th.  If you are interested, check out 
http://www.52daychallenge.com and you can read the faq here: 
http://forums.menshealth.com/thread....&thread=111389
We are still working on the migration 
If you have any questions let me know!
-jb