mount -t vfat -o umask=000 /dev/sdb /media/usb
helped me out with my Creative Muvo on my FC3 box (though I suspect I probably need to upgrade the kernel
That said, I just wanted to express my appreciation for your post. I hope the rest of the problem was resolved for you somewhere. If not, let me know. I'm about to post to a LUG I'm a member of to see if they can suggest another 'quick' solution
so that I don't have to bugger with the command line
(it's great that it's there though for those moments when you 'REALLY' need it).