Simen Svale Skogsrud found these words which I liked:
"I am a symbol-processing kind of guy. I
have almost no practical skills: I am virtually
unable to build anything from cardboard,
wood, PVC or other "real life" materials.
Lego bricks closes the gap between the
symbol-oriented mind and the real world." -
Nevertheless, his page has some interesting articles about
navigation and proximity detection.
Doug Carlson has built numerous interesting things, most notably
about the "Tri-Star" and "Killough" mobile platforms and a robot with
six pneumatic legs.