I've been waiting for some time. The couple of sneak previews I had only made me even more curious. And finally, on June 5th, 2009, AutoDesSys officially released bonzai3d.
bonzai3d being based on a powerful geometric engine, creates 3D models described by exact geometry
How is bonzai3d different from its older and more popular brother? bonzai3d is a sort of Google SketchUp without the limitations of the polygonal geometry. While SketchUp can create "good looking" 3D models and pictures, its geometry is mostly useless and can't be passed down to the manufacturing or construction processes or reused in a professional CAD system. bonzai3d however, being based on a powerful geometric engine, effortless creates 3D models described by exact geometry that can be successfully used in all the processes that follow the conceptual design.
bonzai3d doesn't have any ambition to compete with formZ, but rather to provide a valuable support for conceptual design while complementing existing design systems thanks to very good import/export capabilities.
Video Introduction to bonzai3d UI