It's been a few months since I posted on my page on the Math Forum - it was a really busy summer (and September, and October...)
I hope to post regularly again, and as a start, I just uploaded the November project: creating a plane perpendicular to a line.
It's a pretty simple concept - using the Follow Me tool to create a perpendicular face, then using that face to set the plane.
Check it out.
Anyone can design anything in 3D! http://www.3dvinci.net/