I'm not sure how well known this is, so forgive me if this seems obvious to you. But if you don't know about it this is a very handy trick.
I recently blew away my MediaX menu directory (doh) and needed to recover it from a burned DVD+R in my Xbox software collection. I searched around for a tool to allow me to read the disk in a Windows machine but I couldn't find one; that struck me as odd. I was about to run a long ethernet cable downstairs to FTP the files off my Xbox directly when inspiration struck.
I put the DVD+R in my DVD-ROM drive in my Linux workstation; this is IDE device /dev/hdc. Then I typed this:
|extract-xiso -l /dev/hdc|
Turns out that extract-xiso has no problems at all reading from raw /dev nodes; it worked fine! I then used extract-xiso to recover my files back from the DVD+R, which was both a lot quicker and a lot easier than FTPing them off an Xbox.
As I said, possibly this is a well-known trick, but I thought it was neat and just incase anyone didn't know you could do it... well, now you do!