I don't seem to be able to click any of the buttons in the Witcher 2 screen, only the Visit Forums button; I can't even click the FAQ buttons. I don't think there's a region lock -- that's uncharacteristic of GOG :) -- so maybe there's some other problem, like too many preorders so they disabled the buttons for a while. Does anyone else have this issue?

I'm having the same issue. I'm trying to pre-order, but I can't :(

Indeed, same here. I'm using Firefox 32-bit on Win 7 64-bit w/ NoScript but with scripting enabled for gog.com and cookies enabled.

I had the same problem until I went to GOG.com directly then clicked on The Witcher 2 icon at the top of the page. Worked just fine for me after that.

How odd. That worked for me. I think, however, maybe the problem was just fixed. Because when I went back and entered the same way I did the first time, it remains working.

Since I posted this thread the problem got fixed and I was able to pre-order the game.