Web Directories/Portal Sites/etc.

• discogs.com - electronic music database
• Hyperreal
• IDM Warp Zone

Labels

• Astralwerks Records
• DHR:Digital Hardcore Recordings
• Mille Plateaux
• Ninja Tune
• R & S Records
• REPhLEX Records
• Thrill Jockey records
• too pure records
• Warp Records

Artists

• Aphex Twin
• Autechre
• Bjork
• Boards of Canada
• Leftfield
• Massive Attack
• Portishead
• Radiohead
  • official(radiohead.com)
  • radiohead.org
  • follow me around
• Squarepusher (fan site)
• Stereolab
• Tortoise
• Underworld - dirty.org

Internet Broadcast(Radio/Video/...)

• comfm - live radio on internet
• LIVE365.com
• Live Radio on the Internet
• SHOUTcast
• spinner.com
• sputnik7