That's a great idea. There will probably be some hurdles though. I have never used a Cricut machine but I've seen the commercials. If they work anything like a signshop vinyl cutter (which I use daily) you would first have to convert the .pdo file to a vector image, such as an .eps or .ai. The other issue is that all the materials that I cut have to have a release liner (even the heavy stuff like sandblast stencil).
The Cricut machine may work differently and I definately think this deserves further investigation. I'll see if my sign software is able to import a .pdo file and convert it.
Good thinking!