I put two projects online I had laying around for a bit. ZAmazon is a zope product, allowing you to do Amazon searches from within Zope. SixMovies is a game where you have to find the shortest route between movies by finding actors that played in movies that had actors that played in movies etc. until you get to the target. The games doesn't really work because of the shallowness of Amazon database, but it gives you an idea.
Why on earth do people buy old bottles of wine when they can get a fresh one for a quarter of the price?