Emigre
More than just a type-foundry (albeit one of the best ones on the planet), Emigre consistently provides a well-designed and well-articulated platform for leading designers to sound off on the terrible (or some might say exciting) state of a profession in flux.

B. Fleischmann
 Beautiful grainy ambience draped across raw and sturdy percussion. Hunt down each of this man's 7"s on the fine Morr and Zeal labels and love them.

Ghostly International

Kompakt
They're so damn good, it's kind of scary.

Morr Music
Smart pastoral electronics.

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Wolf's Kompaktkiste
The yellow pages of electronic music. Absolutely indispensible.

Discogs
A perfunctory looking database, but a terrific (and highly addictive) way of keeping track of the records you own and desire.
A Get Together to Tear Us Apart
A stunning graphic magazine. Note: you have to click-and-drag to turn the pages.

Pleix
A refined buffet of Flash pieces.
The Surrealism Server
Critical paranoia & other games the crazy Parisians played

Mayakovsky
The original Old Bolshevik: he decried the 'lust of Mammon' back in 1919, announced that he did not 'withdraw from politics, only in art there should be no politics', was transformed into Stalin's lackey, and killed himself soon after. This site does a fairly good job of filling in everything else.