From Kevin Kearns:
Zompist is a cool intellectual exercise.
I like: Institute for Figuring
I am sure you have already seen instructables, but to make sure.
Last weekend, I got to chat with the guys who started MAKE, they were neat. And, I like their magazine.
I like to visit we-make-money-not-art to see new, cool art.
I am sure that you know designboom.
I like checking out to see what Eyebeam has been doing.