Download AE CS3: AEP
Eight pre-made comps with Trapcode Particular v2 using massive amounts of particles. Download the AEP and play with the settings! There are seven extra comps in there as well - so 15 comps all-in-all! + one edit for benchmarks. Uses Trapcode Lux, Form and Horizon in some comps.
The massive amounts of particles are generated using the Aux system which is a function that allows emitting particles from particles. The Aux particles create trails from the main particles. These are then in turn affected using different things like gravity, turbulence etc.
Took me 45 mins to render the "edit" comp (consisting of eight comps, 47 secs in total) using my MacBook Pro 2.5 GHz Intel Core 2 Duo. What's your render time and hardware?
How about hooking up Emitter Position to Sound Keys? Could be worth a try!
Design & Music by Peder Norrby / Trapcode / Rymden
Download AE CS3 AEP
The music is available under Creative Commons Attribution license for download: http://soundcloud.com/rymdenmusic/pentagram-mstr