PC World charge £64.99 for this. Play.com sell it for £39.99 (cheapest price I could find). Use PC World's price match to get this for an extra 10% of the difference off the Play.com price when you buy PC World.
At time of posting, both PC World & Play appear to have stock.
Compatible with USB 2.0 specification
Compatible with USB2.0 and USB1.0
Compatible with Windows 2000, XP and Vista
Writing & reading speed: 10MB/s & 25MB/s
Capacity: 4GB to 16GB
Weight: 14 grams
The discount would be even greater if matched to Amazon (Amazon price £39.01) but Amazon are currently out of stock