I did a search and found out fr-3 is the recommended board, but who sells this fr-3 type boards?

Is anyone doing double sided boards using the engraving method?

I'm thinking about going single since it would be easier to start out with.

I found some single sided boards on digikey, but I'm not sure what is a good choice on width, material, or type.

http://www.digikey.com/scripts/DkSearch/dksus.dll?Criteria?Ref=329252&Site=US&Cat=32375757

Thanks for the help.

Nick

The standard PCB laminate is FR4 1.6mm. If you intend to mill out the tracks then you do not need the copper coated with photo-resist
For higher currents you can use a thicker copper laminate but these are more expensive and take longer to etch. Soldering some wire to the track works just as well
Cheaper PCBs pased on a paper glass mix are also available and are easier to drill eg CEM/1. While not as strong as FR4 they are easier on machine tools and drills and can also be punched.
When drilling it is helpful to use a backing sheet of Alu foil coated SRBP board
for the drill exit this helps prevent drill breakage
For supplies you could try the us rep for Mega

http://www.megauk.com/cgi-bin/mega/lp.pl?page=http://www.megauk.com/
http://www.vpcinc.com/Products/pcb.htm

If you are interested in some background on commercial manufacture look here
http://www.personal.dundee.ac.uk/~gjzcallo/