SVP Communications are doing 4GB USB pen drives at a stupidly good price. I'm sure as with all computer stuff they will only get cheaper but this seems to be the best price for a 4GB USB pen right now.
The price comes up as £12.98
If you sign up to the site (free) then login you get a slight reduction on all their products taking the price to £12.85
Delivery is £1.49
You can also get an extra 3% cashback by going to "SVP" from your quidco account :)
Hope this is a good deal for you peeps...
EDIT - Apologies....The newsletter thing you have to sign up for the few pence off is actually here http://svp.co.uk/hukd.php
Its a long running promotion for HUKD members