Slate Star Codex
Top notch blog, one of the only ones I find myself reading with any regularity
Pick Up The Phone Booth And Aisle
One of my favorite text adventures
EverythingIsChemical
Music blog with a regular "cool free music laying about the web" segment that I find extremely helpful
Cliff Pickover's RealityCarnival
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No Pulse: How Doctors Reinvented The Human Heart
"Just as human flight wasn't possible until people gave up the idea of imitating birds, permanently replacing the most vital of organs may not be possible without ridding our minds of the heart's telltale beat."
CROW CILLERS
Monthly downloadable comic