It looks like our beta will be out in a couple of months, maybe sooner, maybe later. We are currently working on our knot diagram, which is a daunting undertaking. Our beta will hold most of the requests we've received, and it should be near production we think it should be in a few patches.
In the meantime, here are some videos of some of the research and development we've done:
Then here's a video showing my latest project with EmberGen: Fire Arrows