The new content and improvements will be available to registered users of the game free-of-charge.
I really do admire the developers for making this decision. They really have very little to gain other than a better reputation from this, the game price will have already plummited due to an unpopular release so i imagine profits from this will be slim compared to a full launch.
I only got to act 3 in the original version, i'll be replaying the game when this comes out.
I sold my copy of the Witcher but I may play it again with this enhanced edition. It really was a sweet RPG.
Any idea on price?