A Neat Ideavirus
No real business model here, but it's organic and it's growing like a weed. Thanks to Joel Kotarski for the tip. Click here to see The Human Clock
I think the lack of smoothness is part of the appeal. Daniel, the creator of the site, isn't trying too hard. It's a neat idea, and if you want to share it, go ahead. No prizes, "tell-a-friend" buttons or much of anything else.