TinyDisk is a file system that runs on top of link the TinyURL shortening service and similar services such as Nanourl. It provides a write-once-read-many anonymous, persistent, and globally shared filesystem. Once something is uploaded, only the database admin can delete it, everyone can read it, and no-one can know who created it.
freshmeat.net: Project details for TinyDisk
Stuff like this is why you can’t stop folks from downloading the latest Britney song:) There are some interesting possibilities with this sort of software. Think of one time drop boxes, etc.