I was waiting for the guy who uploaded two new demos to the file section to announce, but it's been a few minutes and nothing, so I'll link them here for those of you that don't habitually check the files section and aren't admins ;)
Space Battle Goddess Mildred: An impressive particle-based space shooter.
Zonker's Racers: This is apparently a tech demo involving particle-cars racing around tracks.
There are no readme's in them, and if Space Battle Goddess Mildred crashes, you'll need to edit bullets.vc and change:
#define MAX_BULLETS 100
to some larger number (I used 255 and it was fine after that).
Anyways, these demos are neat. Will the person responsible for them please stand up and take a bow? :)