Highly unlikely 3DRealms has boatloads of cash. They wont be running out anytime soon.
They, switched engines three seperate times, and started over from scratch twice.
3DRealms is funding this on their own. They are like id, they only have a publisher of their choosing, publish and distribute, there are no publisher set milestones, there are no publisher cash advances, etc. Their publisher can get pissed all it wants(they already have), but the fact of the matter is 3DRealms is paying for the development, so it doesnt matter. This isn't like Ion Storm - Dallas where the publisher was footing everything.
Yes it was stupid for them to show up at three years of E3, straight hyping the product, etc. However I would not be suprised if DNF ships by the end of 2004.