I don't know if anyone has mentioned this here, but I was just turned on to a great website.
http://www.emachineshop.com/
Check it out.....download a simple CAD tool, design a part, and upload for quote and fabrication.
This is the kind of simple stuff an Electrical guy like me needs. (for those simple parts I might want to make!)
BTW: For you electrical guys, you might also want to look at
www.pcb123.com for making printed circuit boards. Download schematic and layout tools FREE. (including an autorouter FREE)
Have fun,
-Quentin