Yours is cleaner and that mixin thing made me dizzy just looking at it and after going to Sponty first, I was taken aback by how mixin looked so complicated, had so much text and wanted to inundate me with words and junk. Doesn't matter if it's true, that was my impression.

I think you've got a good core, you'll need some other "hook" to draw a critical mass of folks, I think...but the basics are there in my mind. Easy to use, simple and cool.

Thanks for sharing.