Upload & Sell: Off
I was looking for a USB-Firewire for my Laptop so I could get at the P.Fn on my 1Ds MK I as well... where'd you find that at?
it was part of a $4.00 attachment/ laptop kit. nothing special at all.
it goes from the larger firewire style (male) to plain old usb (male).
I didn't think it would work, and tried a number of times and gave up.
one day I was distracted by something else while I was attempting to get the thing going and it just sat there for a while (3-5 minutes). after that it worked.
now I have to remember to wait each time I attach it. that could be just my laptop, donno.
edit: for what it's worth, the firewire port on my laptop has never worked for any camera body I own. but I've never tested that port on any other device.