This is a very quick prototype of a wireframe 3D engine I built to a) prove to someone at GameBlender that it is actually possible and b) to hammer out some functions needed for an up-coming version of The Burst Engine.
Unfortunately in most user-agents, the high poly-counts you would expect from even a simple game character slow the browser to a crawl (if it is fast enough to be called a crawl). Chrome does appear to be fast enough to handle an original PlayStation game from some tests I have seen. But I expect all browsers to reach this level of speed within a year's time.
Case in point: this example demonstrate the possibility of rendering and transforming 2D SVG graphics in 3D space as each face is a Canvas path. So creating simple 3D GUI elements that can be exported from Blender3D without the use of Flash is a viable and very much in the pipe-line.
Code is open, feel free to use.
F1LT3R