The software looks great Art, though I'm not setup to actually cut gears yet. It has inspired me to build a rotary axis.
Ha, I notice you haven't posted a link back to your new Gearotic site. Maybe you should edit your signature to reflect this.
Just so people know in the mean time it's http://www.gearotic.com/
I havent looked closely, but can it be used for cutting rack and pinion?