I noticed something I missed in March. We've all been waiting on BP 3.0 for OSS OpenCL supported physics under linux. I noticed that ver 2.8 already has GPU support for its rigid body pipeline. They include some precompiled demonstration binaries which may be a nice addition to the Phoronix Test Suite.
Take a peek
I really meant Bullet Physics :-)
(The project that allows for building to JS is this: https://github.com/kripken/emscripten/wiki. I almost crapped my pants when I first the BB engine running in a browser with WebGL...)