Lon Safko has created one of the coolest, most efficient business models I’ve ever seen. He sells paper model designs to kids for $10 on his Yahoo! store.Here’s how it works: a kid logs on the site, selects a structure he wants to build, buys the pdf file using Mommy’s credit card, prints off the design, and builds it in under an hour using only paper, Elmer’s Glue, and scissors. Lon then makes off like a bandit only having to pay server fees and the cost of contracting new paper designs (if any). He markets the site using good ole fashion PPC arbitrage and proper SEO.Sweetness! Forget these fleeting, unproven “Web 2.0” companies. Money 1.0 for the win.