I think the last time I saw this it was a spinoff off a market trading application that was (at the time and even now) one of the most impressive web applications I'd seen.
That's quite a co-incidence. Back when I was making the front end for a Forex trading app, I considered using this very library for the task. Project didn't actually get started and I moved onto other things. I was very keen at the time to give this a go as it seemed to fit well with the requirements of the time.