Babbage's Difference Engine, made from Legos

Neurosky appears a cool company that is making a non-invasive device that reads brainwaves and eye movements to act as an interface to various devices.

Here's a good article debunking Aspartame myths

Another link I found interesting today was A Turing machine implemented in Conway's Game of life. There's also some good links off of there to other cool Game of Life stuff.