I know there was a thread on this 3 weeks ago; that is where I heard about it.
I ordered one on Amazon, since they seem to be about $400 off the "normal" price and they won't ship for a month. It seems to be an extremely elegant solution for those of us with 90" ceilings, but it sure would be nice to hear from someone who has actually used one.
One thing I wonder about JDS is their use of impellers that give high air movement at high static pressures (at the expense of really high air movement at low static pressures); since I will be using 4" (or maybe 5") hoses, that is a great feature. however, I wonder why others don't do it.