Just thought you might like to know that i hve found a 4GB USB pen stick that works. It reads the firmware updates from it and music. It the HP 4GB stubby little blue stick. Great that it is stubby as you can leave it plugged infrom gig to gig so ou never forget it and you always have music. Currently £5 from mymemory.co.uk
I bought a 2GB and the 4GB and both worked. Not tried the 8GB as yet
The link from My Memory is