Check out:

Playground on the web
Playground @Myspace
Playground @Facebook
Playground @Youtube
Playground @Twitter
Playground @Jumping Fish
Playground @Musicwave
Playground @Reverb Nation

Good music
OK
Vangelis Orfanidis
C.O.D.E.
Jane Doe
Massroom
Trap
Jumping Fish

Misc
Webabouts web developing
Free VST
NOIZ music technology online
Avopolis