Sandisk 2GB Micro Cruzer USB 2.0 Flash Drive - £10.71 inc vat, buy 3 and one is pretty much free with Googlecheckout
Cruzer Micro is an incredibly small USB Flash Drive (UFD) that connects to a computer's USB port. Users can easily store their key documents, pictures, music and videoclips on a Cruzer Micro and transfer them to another computer with a USB port. In addition to its small form factor, Cruzer Micro can be expanded to MP3 player functionality with the Cruzer Micro MP3 Companion. Users simply plug the Cruzer Micro into the Cruzer Micro MP3 Companion and they're ready to hear all their favorite songs.