Firewire
Today while browsing the local Media Markt I found iPod Firewire cable for € 5. I guess everyone uses USB2 to sync them nowadays so they were clearing them.
I grabbed two of those and tried to make a short (at about 20cm) firewire cable to use with my 2.5″ harddisk enclosure. All my other firewire cables are 1.8m, too long to carry confortably with such a tiny disk.
Anyway, here’s a pic of how it ended up, which is not too bad considering the pins are a bitch to solder on (and my soldering iron’s tip is the size of a 747 engine) and I got some pins wrong at my first try and had to desolder and solder them again.
The plastic end of the plug comes out easily, just wiggle it a bit. Same fort the rubbery thing between the cable and the plastic casing. Don’t break them and you can reuse as needed.
For future reference, in case I need to do this again. Pinouts here, wiring here:
1-1
2-2
3-5
4-6
5-3
6-4
My next project will be a dock (for the hi-fi and/or car) for my Nano with the leftover iPod connectors. They open easily too, but I guess I’ll need a new soldering iron and no coffee intake in the previous 48 hours for that! 
The pins are so tiny!