Hellgate: London E3 previews saying virtually the same things are up at Actiontrip, IGN and Gamershell. From IGN,
When the press first got a peek at Hellgate, you probably
heard about the dynamically generated maps. And you probably snorted
and said, "Whatev! Random 3D maps! SheahwhatEVER!" Well, kids, I'm here
to tell you that yes, it does work and yes, I was indeed seeing the
randomizing in action. I asked a rep, "So how much of this demo is the
game itself?" And he said, "It's hard to say, because all of this is
randomly generated." But you couldn't tell that the areas hadn't been
hand-crafted. It all felt fairly natural, although there were some
empty rooms where I think monsters should have been (which probably has
a lot more to do with the earliness of the build, not the faults of the
design). There were no weird intersections or random dead ends, no
phone booths sticking out of walls--it felt like a real place, although
one full of homicidal demons from Hell.
If the randomness doesn't work, the game won't work, is the impression I'm getting.