diggnation : weekly video podcast in which Kevin and Alex talk about tech/web culture stuff.
wine library TV : daily video podcast about wine by Gary Vaynerchuck.
YouTube : people posting videos online.
flickr.com : photo sharing site

fabchannel : live shows from “Paradiso” and “de Melkweg” concert venues in Amsterdam.
SomaFM : some cool internet radio streams, playing various kinds of electronic music.
monotonik : online electronica label.
pandora.com : personalised radio streams according to your taste. Unfortunately bans non-US visitors at the moment.

Soundhack : free sound manipulation software for the Mac by Tom Erbe.
Marcohack : free sound manipulation software for the Mac by Marco Pranger.
Pd : free Max/MSP -like software by Miller Puckette, the original creator of Max.
Versiontracker : keeps track of all software updates.

Access : makers of the Virus synthesizer.
Taylor : makers of nice acoustic steel-string guitars.
Apple : makers of the Apple Macintosh computer

Macsurfer : gathers many Mac related headlines daily.
AppleInsider : rumors about new Apple products.

Sonology : the Institute of Sonology at the Roayal Conservatory in The Hague.
ICMA : the International Computer Music Association.
CNMAT : the Center for New Music and Audio Technologies in Berkeley, California.
CREATE : the Center For Research in Electronic Art Technology in Santa Barbara, California.
STEIM : the Studio for Electro-Instrumental Music in Amsterdam.
IRCAM : the Institut de Recherche et Coordination Acoustique/Musique in Paris.