I have another link to add to the Big Brains section of the links page: Math World. This is an amazing mathematical resource, with close to a thousand interactive Java applet examples created using the Mathematica engine, created by Stephen Wolfram , whose brain is staggeringly huge.
And on a lighter note, I recently came across the Tao of Programming . It is meant to be a satire site, I suppose, but reading through it, a lot of this (surprisingly apt) re-interpretation of the Tao Te Ching rang true for me. Your day will be better for the experience.