Just a little info in case you held off for the 360 version. It will be a enhanced version with 4 hours of new content added. Lets see if it will be avaible for pc as well.
http://www.gamebanshee.com/news/106478-the-witcher-2-on-xbox-360-to-be-enhanced-edition-comes-with-4-hours-of-new-content.html
http://www.gamebanshee.com/news/106478-the-witcher-2-on-xbox-360-to-be-enhanced-edition-comes-with-4-hours-of-new-content.html