I've not only heard of it, I've played it.  It's seriously very, very fricking hard, or at least it was when I had a go at it.  Dude was still working on it at the time, so gameplay may have been tweaked since then.  If you're a good DK player, and ready for something more challenging, then you should go for it.  If you stink and can't pass level 2 on the original, then forget it.