The Witcher 2 is now available to "pre-download" from gog.com, if you purchase the game. You can dl 95% of it now and the other 5% on release day. The download right now is about 9.7GB, but I'm getting excellent download speed from them averaging about 11MB/s, (about 15 minutes to download) very nice. 
(edit: you can download 9.6GB now and the other 122MB is the last part you can't get yet)
http://www.gog.com/en/news/purchase_and_pre_download_the_witcher_2_assassins_of_kings_digital_premium_only
Purchase and Pre-download The Witcher 2: Assassins of Kings Digital Premium only on GOG.com
You only have 6 days left to pre-order The Witcher 2, but that’s not the great news today. The great news today is that now you can officially purchase and pre-download 95% of the game before launch day--a GOG.com exclusive! You won’t have to download the whole game on the release day with the whole world, so you’ll be able to play The Witcher 2 sooner. Get it DRM-Free only on GOG.com with the best digital distribution package available.
Pre-order now to grab the full exclusive bag of goodies with all of the bonus material: a virtual version of the collector’s edition artbook, the whole soundtrack with 4 unreleased tracks exclusive to GOG.com, wallpapers, avatars and a photo tour showing the behind the scenes work of your favorite CDProjekt Red team. Last (but not least!) you get one of five epic RPGs for free.
If you don't know what the fuss is about, our very own sister company CDP Red is about to blow the world away with the new Witcher 2 :) They listened to community and fan feedback, they incorporated all the changes people wished for and they have a whole lot of surprises waiting for you in the next installment of the Witcher saga.
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"
