Mark,
I have successfully made clones several times. I used a PDW-F75 as the “writing” deck and a PDW-U1 as the “reader.” I used the PDZ-1 software. Use the “Tools” dropdown and you will see FTP and FAM disc copy. I am not in front of the software, but I think I used FAM. The help file pointed me to the right choice. It is not the fastest transfer, but it is a clone, all the way to the disc name.
Hopefully the promised drivers update at NAB for U1 will give is write capability 4Q 2008.