Some of my favorite links.

Micros.

68HC11 Information.
http://home1.gte.net/tdickens/68hc11/68hc11.html

BASCOM-AVR
http://www.mcselec.com/

PIC Basic Pro
http://www.melabs.com/mel/home.htm

PCB design.

EAGLE 3.5 Light, and don't forget to check out the download user files mill2.ulp.
http://www.cadsoft.de/freeware.htm

CAM.

KellyCam3.
Windows based Router/Drill software is designed to run low cost CNC equipment.
http://www.kellyware.com/kcam/kcam.html

AutoEditNC.
32-bit Windows program to assist in the creation and testing of Numerical Control (NC) programs in the Fanuc/G&M-Code format.
http://www.teleport.com/~mattsonm/autonc.htm

And the best place to start looking for information (besides http://www.egroups.com/group/CAD_CAM_EDM_DRO)
the FAQ list at http://206.19.206.56/cadfaq.htm

Make your own Engraving machine. site : www.geocities.com/majosoft/

Electronic suppliers.

Dontronics, a source of SimmStick PCBs.
http://www.dontronics.com/

Oatley Electronics, the source of my stepper motor drivers.
http://www.oatleyelectronics.com/