Been using PI for a while (more as a hobby than anything else) since back when impulse still had imagine for windows as an active product. Hardly ever shared much but finally have something show worthy.
As a game art and design student, I am making a lot of games now to demo. I've recently been involved with a project where PI really came in handy. I didn't create the effects from scratch. Instead; I combined other particle emmiters from the free user libraries, combined them and tweaked them to death in order to get the right look and feel for the game demo.
Here is a video and the download link (via more info in the youtube posting).
BTW - Kepp those Youtube videos coming there Mr. Particle,I love every minute of these.