Papercasting: paper e-mail and the pro-con list

This week I visited San Francisco, and happened into one of those stores that sells cool young-person junk, you know the stores, skull-themed messenger bags and crass double-entendre bumper stickers and bobblehead dolls from 70's cartoons?

In said store, I found several products that could prove useful to the paper blogger and other fans of offline communication, made by a company called Knock Knock. Had I found the Paper E-mail Form, I would have purchased it immediately. As it stood, I had to make do with the Pro Con List: