Thats nice but it is strange that someone with a history of making MTB would opt for road size wheels on a mountain bike.
Honestly, I've been riding on 29ers for the last year and I'll never go back, this coming from a guy who learned building in a world of early mountian biking innovation.
The unfortunate truth is that the majority of manufactured 29er designs suck balls...they just did not take the time to analyze how the frame dimensions NEED to change with the bigger wheel size and it's relationship to the riders center of gravity. A grave error as it has led to a negative handling perception for a lot of people who just wanted to try the bigger wheel out.
I'm with Mike on fit though...I've done a few really small 29er's for customers (think 10" frame) and did not care for the design compromises that had to be made.
I've got three 650b's in the build queue and am looking forward to fabbing them up...the bigger wheel makes so much sense for ride performance and now with the addition of this size, will fit a smaller rider with more function and grace.
Back on topic...the 3D looks like a fun ride with some unique twists on an old design. Nice Chris!