Interesting, maybe the time has become right.
I still have never seen or played them first hand , but saw Whitney's website years ago and immediately loved the concept. Forum threads on the them come and go. The first such thread I remember people mostly hating them because they didn't look traditional/familiar and people even said ugly. It is really good to see minds opening towards them. I have always felt that traditional drum design is not user friendly, and fraught with set up take down and transport issues. The one area I think they could use improvement is with finishes. A lot of their stain work looks amateur. The shells without all the lugs and junk allow an artist's canvas of sorts, allowing potential for really cool/beautiful art.
I would love to have a nesting kit like the Whitneys, I think the concept is just excellent!