There's been a really good track played on the Digitally Imported - Chillout channel called The Dune Mix by Mike G. It runs for 75 minutes and captures the qualities of the book and Lynch's film. I just discovered that you can listen to this (and others on demand at www.ambientmusicguide.com. In particular this page for Mike G's stuff (including his regular shows from 2007).
And just in case you're lazy, here's two direct links:
- WinAmp Link (also plays on VLC Media Player, foobar2000, Amorak et al)
- Media Player Link (needs the Orban aacPlus plugin installed)