This self-hosted application allows you to create a wishlist of gifts for yourself, and to see wishlists created by other people in the system. Then, all of you can "claim" gifts that other people want, and the system will prevent two people from claiming the same gift.
A jeweler who manufactures pieces inspired by (modern) fantasy, such as the Dresden Files and the Lord of the Rings.
Everyone's favorite t-shirts from the 80's.
A service that will print high-quality stickers, business cards, and what have you out of images that you send to them. Their prices are quite reasonable, also.
A website where you can purchase copies of the US Bill of Rights on metal cards and luggage tags.
From here you can purchase a DIY kit for a circuit that implements the German Enigma cypher from World War II. Fun for cypherpunks, electronics mavens, and geeks!