Duke Nukem Forever to use Unreal Engine
From George Broussard's .plan file:
We are switching to the Unreal engine to finish the game. You will be able to find a press release online at www.3drealms.com in the next 24 hours. We are very excited about this decision, and we think our fans will be as well.
We don't feel there will be a significant development delay, but there will be a slight one as we move over to the new engine. But this is analogous to people moving from the Quake 1 to the Quake 2 engine. Our game data will convert right over, without a hitch.
It's very important to note that this was a tough decision for us. It does not stem in any way from hard feelings, nor in fact, anything to do with id software. Our relationship still remains very good. This was a business decision and based on what we wanted to do with Duke Nukem Forever as a game.
Now, if you will excuse us, we have a lot of work to do ;)
UPDATE: The press release from 3D Realms regarding this decision (with explanations as to why we did this) is now online. You can view it at http://www.3drealms.com/press/dnfunreal.html.