For those who love to blow stuff up!
A FREE screen saver from random-ideas.com:
Now updated for Leopard!
Fireworks screensavers have always held a fascination for me, from the earliest versions I saw first on MS-DOS, to the newer ones in Linux. Unfortunately, I’ve never really been totally happy with any of the others, because I could never control the parameters of the simulators enough to make them look the way I see them.
Highly Configurable Particle Simulation”
(Get it HERE)