Shortages in other places often prefigure shortages here. Probably a good time for US gamers to pick it up if you've been undecided. GMT doesn't continually run games -- once it's out, it's out until it finds a place on their print schedule (see Sekigahara).
I'm not sure if there will be a second edition. If there is we won't be changing the map, rules or cards, except the licenses we paid for certain of the images on the cards will not be renewed so we would have to find another option for those cards. There still should be about 2000 unsold copies.