Interesting idea Mike, but why don't you just kick it off straight away with some off the shelf tools and see if people respond.
Actually I did trial it and got some good feedback and great learning. But was constrained by the trial limits of the off the shelf stuff I was using, plus this time I want to do a better job of getting the message out.
I plan to do it again with different off the shelf. With the folk who respond to the signup.
Thanks again and if more comments come to mind, I'd love to hear them.
Mike