MBONE - The MultiCasting Backbone, which can enable thousands of users to listen to a single stream of multimedia data. JetCafe Studios broadcasts music 24/7 on the MBONE, follow the link to see how you can listen.
Wilson Bros Electric - Need electrical work done? These folks did JetCafe an extra dedicated circuit.
Hubble Pics - Neat pictures which should humble the proudest of you.
Planet Quake - If you are into Quake, this is an important place to know about.