Yeah, like a CNC milling machine.
So that's what is really cool about the Makerbot. There are all sorts of different nozzles and various hacks that can be done. One of the things that can be done is CNC milling.
The free-ware program that is used to generate the code for the bot is called ReplicatorG. That program has default modes for CNC milling. I would simply need to replace my heated nozzle with a Drimmel type head and then I can cut objects directly out of metal (AR-15 lower anyone?)
Also, Makerbot has the Frostruder. Basically, a syringe instead of a heated nozzle. You print stuff out of eatable materials such as peanut butter or chocolate.
Check out this video on the Frostruder.
All this stuff is totally cool and I've geeked out on it for a few years now and still not bored with it.