Competition?

So, I haven't been doing so hot the last two weeks and I was thinking that maybe a little friendly competition might help the cause.  So I was thinking of starting a pool of moolah and running the competion til November 23rd.  (The last tuesday before Thanksgiving)  So what I was thinking was that everyone who wanted to participate would put $20 into the pool and at the end of the 7 weeks the person with the greatest percentage of weight lost would win the money.  Maybe we'll do a small 2nd place prize?  What does everyone think?  Anybody want to do this with me?