E-Z rollover worm composter, yep seen it :). Never seen it for real or used it though.

http://www.youtube.com/watch?v=t_5Lv8Ou7Fc&feature=related

Thanks for posting this link. I had never seen this design before and I am really excited about it. It essentially converts the basic bin design into a flowthrough. I want to make one and start using it!

Be sure to park it in the shade.

Yeah, I am the Easy Roll worm bin guy. I have been getting lots of plan downloads, and hope to film a new series on it. I also get orders for completed bins, but plywood is a little heavy and drives up shipping (which is why I also make available a partial kit). I am amazed how long plywood lasts, as I have some of these bins that have stayed wet (without paint) for two years and still holding up!