Witcher Update:

An Enhanced Edition will be released soon.
There will be a re-release of the game containing the Enhanced Edition, a new Bonus DVD(with the D'jinii Adventure Editor and two fully voiced Witcher-adventures), a new Making-Of DVD, a map, the game guide, a strategy guide, a short story written by Andrzej Sapkowski and 2 music cd's: one with music from the game and one with 'inspired by' music.

People who already own The Witcher will be able to download the Enhanced Edition upgrade.

The Enhanced Edition contains a lot of new NPC gestures, rewritten and re-recorded dialog, an inventory overhaul, decreased loading times and 9 voice overed languages. These are the major changes, but the Enhanced Edition contains a lot more of upgrades, fixes and improvements!

The D'jinii Editor is already available as a seperate download IIRC.

I'm waiting to start over (again, it's like 5th time already :p) til they release the Enhanced Edition, so I can fully benefit from it. I just hope I'll be able to keep focused on this game past Act III, cause it's a great game!