I'd definitely be up for a challenge.... bought my Wii Fit with the best intentions which lasted about a month LOL - mine is also gathering dust, only go on it now when I want to weigh myself!
I have no wii fit so no challenge for me
I also have arthritic knees so find exercise painful
as I lose weight I plan to walk more (to start with) and work on exercise as the weight goes down
but good luck to all in the challenge - I really wish I could join in