There is some work on a converter cable. Here are a couple links to get you started on a watch. There is newer information, but I don't have the bookmarks with me and they are not on my Firefox synch account.
http://www.slashgear.com/zune-to-ipo...ion-024162.php
http://www.zune-online.com/news/zune...d-pinouts.html
Btw, I have an iPod given to me from a vendor and my son gave me his Gen 1 Zune when he bought a Samsung P2 and I much prefer the Zune. Though the Samsung is the coolest of all.