I've made two video's of somewhat better quality, resolution and framerate on the GTS 450, which is about 5x faster than a 8600M GT in Tokap (and about 8x faster in Futuristic Buildings).
The animation is now being rendered at 60 fps, 8 spp per frame and 512x256 resolution. The physics simulation itself runs internally at 60 fps, so the physics are rendered in "true" real-time.
Video of Future Buildings v2 ( 8 spp per frame, 640x480 resolution, still no acceleration structures):
The source code for "TOKAP with Bullet Physics" is available at http://code.google.com/p/tokap-the-once-known-as-pong/downloads/list