AFAIK the Vodafone-branded reader/writer is on sale separately in highstreet Vodafone shops, Bryn
Goes for about 20 quid. I also have one I got from the River People for only 12 quid. The casing has fallen to pieces due to punishing service "on the road" (so I don't know the brand any longer, it was written on the casing), but the "guts" of the thing still work perfectly. Both read/write 2Gb cards quite efficiently
(my camera uses 2Gb-SD cards and it's an 8-megapix camera, so it churns-out huge files... no corruption in any of them so far)