Weight loss / body composition challenge?

If there's already something like this, feel free to point me in the right direction, but would anyone like to participate in a fitness challenge of some kind? Seems like a good way to make some friends or stay motivated?

Have sign-ups for a few weeks, and have weekly weigh-ins, measurements, and maybe bi-weekly progress pictures?

Any interest? I would certainly be willing to track progress and keep a thread updated.