I thought this site was kind of cool. Graphical representations of mathematical formulas. A gallery of computational art. The site is called Complexification. Really nice stuff.
Some of the categories have interactive Java applets. Check it out, it’s quite interesting (even if you hate mathematics like me…)
That’s really beautiful. I like the one with the expanding boxes. Thanks! 
Good fun! I played a little with Mandelbrot and some other fractals years ago, and might have to pick it up again.
There once was a man named Mandelbrot,
Who liked complex numbers a lot.
A set he calculated,
And then he iterated,
And colored the infinities real hot.
[sub]I just made that up.[/sub]