The MIXA is basically a 1GB flash drive that’s been integrated into an audio cassette shell. The real appeal though comes with the MIXA website which allows you to interactively design a custom label for the tape. You can choose from a collection of pre-existing designs, which still offer a bit of customization, or upload your own images and graphics. Once the design is completed and the finished USB cassette arrives you can then load it up with your own ‘mix tape’ of MP3s.

source:http://www.ohgizmo.com/2007/10/24/make-a-mixa-cassette-shaped-usb-drive/