Love it. The idea has been tried before, but I've never seen an incarnation this simple. I like that there's no requirement to create an account (for either me or my friend) and the UI feels perfectly sized for the complexity of the task.
Plus, it works. I'd been meaning to clean my desk for weeks, but after assigning $50 to getting it done today I finally did it.
I get the point. I'm saying that if you're willing to potentially lose $50 over 5 minutes worth of self-discipline you might as well spend it on a cleaning service and get a few hours worth of self-discipline instead.
Plus, it works. I'd been meaning to clean my desk for weeks, but after assigning $50 to getting it done today I finally did it.