Bricks of the Dead is a webcomic about zombies using Legos for visuals,
ChromeBricks.Com sells Lego minifigs and bricks that are chrome and gold plated. Like this nice C3PO minifig.
Personally, I think Stargate SG-1 is one of the worst science fiction shows ever, but this gigantic Lego Asgard Beliskner Battle Ship being sold on E-Bay is amazing. Tens of thousands of Legos there, and only $3,500 for the lucky SG-1 fan.
Fine Clonier Decals sells custom decals for Lego minifigs. Each decal costs about 50 cents, and they have everything from superhero-themed decals to World War II.
WoWInsider.com has an interview with a couple who re-created Booty Bay with Legos.Nice.