Hi John,
The APP HQ is indeed our running list of suggestions of what APPs warrant development. We are working on the underlying system that will define how APPs work.
The circle cutter app was our first proof of concept. Until the system is fleshed out a bit furter, even circle cutting is best acheived using the CC comand in ShopBot software. Simple circles, arcs, and lines can be cut directly from ShopBot software similar to how APPS will function.
David