I just picked up a Pelican 1050 micro case for 20 smackers from our favorite online auction site.
Inside, I keep my Ipod, LOD cable, headphone Amp and my livewires all curled up in a velvet bag (that was donated by a targus Travel Mouse that long since died)
btw, I bought a solid colored lid, because the solid lids are lined with a dense foam while the clear lids are not.
So, if i'm ever white water rafting down the colorado river my portable audio gear will stay dry and safe.
Works great in my work truck, too.