John has printed the Europe map a couple times for the folks doing the playtesting. I think he had Kinkos print it out in two 3' x 4' sheets (the map is 6'x4'). I'm sure Kinko's is not the cheapest option, but a 3' wide large format color printer is pretty common. So, maybe on the disk, we'll put the map in two files (a West half and a East half in order to make it easier to hand over to a printer and have it printed).
A cheaper (but more labor intensive) option that John used on the first playtest map was to print it out on a bunch of 8.5x11" sheets and glue them to posterboard. It does not look as nice, but it was cheaper and we went that route initially because we did not know how many changes we were going to have to make.
Mark