Jörgen Städje's Home on the Internet An all around very interesting personal website
Drew Olbrich A collection of personal projects
Vonslatt Lots of interesting articles
Cockeyed Lots of goofy articles, and plus some very insightful ones too
Eddie Matejowsky's home page A cool alternative Australian dude
The Burr Puzzle Site Lots about burr puzzles (I have built several from patterns on this site)
Ben Jackson's website Legos, rolling balls, and digital camera stuff. Fun!
Philip Greenspun's home page Full of himself but interesting reading.
Mike's electric stuff  High voltage and lots of cool stuff
Sam Barrows powerlabs Lots of dangerous high volage stuff
Don Klipstein's Web Site! Neons, LEDs and high voltage stuff
Digibarn Computer museum, lots of online stuff
The New England Rubbish Deconstruction Society (Junkyard Wars team)
Dr Dobb's journal - stuff for serious computer users
Slightly skeptical Open Source Software Educational Society
Bits about Graphics, plotters, 3D, etc. Fairly old but interesting
Larry McVoy's home page Nice homepage. I like the woodworking section.
Folklore.org Lots of stories of the development of the Mac at Apple.
NerdTV Robert Cringley's abandoned tv series (some old episodes)
Bard Litwin's website Artist, craftsman, etc. Makes cool machines
Lars Erikson's website Intersting stone work and other stuff