If you're looking for some really good, chill electronic music to listen to online, check out OEM Radio, Original Electronic Music. To quote the site:

" The music content is wide ranging in terms of genre: you will hear ambient, IDM, downtempo, breakbeat, dub, psychedelic chill, and many other not-so-easily categorized sounds. OEM Radio plays listening music and not dance music. OEM Radio seeks to bring original electronic music and recording artists that are underexposed to a wider audience."