The game is scheduled for an Essen (October) 2009 release, so they probably won't have any information on the CGE site for at least a couple more months. And I'd wager that if you don't get your hands on an Essen copy, you won't see them readily available in the States until about this time next year.
Like Space Alert you'll probably want to order from Funagain (or possibility Boards & Bits) for the Essen pre-order. They usually sent someone there to grab a stack early. As Scott mentioned you'll otherwise wait a very long time or pay a premium on eBay.
Similar thing happened when I bought Galaxy Trucker. I ordered it right before Essen and got it about a year before it showed up in the US officially. Got it for a bargain too since at the time Funagain had no idea the popularity of it so priced it reasonably. When they got their second shipment the price skyrocketed.