Particle Editor

I would be really interested in a simple GUI for editing particle emitters, to take some of the guesswork out of creating a particle script.

like an editing interface with a preview, much like the one used to create body shapes, exept it controls "spread, rate, color" etc... that would be really nice for someone who can build, but can't script worth beans (like me)

There's several resident-written tools for this purpose, and I'm pretty sure I've seen a free one at Yadni's Junkyard.