Hi there Incensedpanther, welcome to the Guild! You should post up your Greyhawk map, I'm sure there are many people who would love to see it and perhaps use it for their own campaigns. I don't know what program you used to create the map, but if you import it into GIMP, and download the Hex Grid Plugin you can insert a hex grid over the map.

Cheers,
-Arsheesh