I picked up a CNC Shark from Rockler. It comes with VCarve Pro which is a nice little application for simple designs and generating the output g-code for the machine. You will probably still want a cad program. While not a cad program, I've been using Corel Draw for many years. I just export dxf or dwg files and open them in Vcarve and define the cut types and order.
Here's a link to it at Rockler:
http://www.rockler.com/product.cfm?p...er=cnc%20shark
Here's a video of my first parts cut from it:
http://youtu.be/02uDnE0aH78
Here's a photo of it in the enclosure I made for it.
Scott