AIVL For advocacy and information.
Bluebelly For all your psychostimulant (amphetamines,cocaine and ecstasy) needs.
Bluelight for peer information and experience.
Erowid to tap the minds of the psychonauts.
FEAD to hear the boffins speak.
Harm Reduction Journal for a little light reading.
Heads Together to network and share.
Injecting Advice for that and more.
Pill Reports for the recipe lists.
Talking Drugs to read all about it.