+1 for SomaFM: Ambient music mixed with the sounds of San Francisco public safety radio traffic: http://somafm.com/sf1033/ http://somafm.com/sf1033/ I also re

+1 for SomaFM: Ambient music mixed with the sounds of San Francisco public safety radio traffic: http://somafm.com/sf1033/ http://somafm.com/sf1033/ I also recommend their DEF CON channel, which has (usually humorous) snippets from various talks between tracks: http://somafm.com/defcon/ http://somafm.com/defcon/