Fallout 3 - Preview @ Games Radar

Excerpted from PC Gamer UK, Games Radar has a very short preview of Fallout 3 accompanied by a couple of new screens.  The text seems to suggest that vaults are akin to something from Dungeon Keeper, although I assume it's a humourous jab:

Consider the legendary ‘Vaults’. They’re shelters, built under rock and granite that protected citizens from the nuclear firestorm. There are scores of them in Fallout’s world, each engineered by a sadistic and warped mind to test its inhabitants. Each has a particular quirk or problem its wretched occupants have to overcome.

Some are built to house 1,000 women, and only one man. Others, 1,000 men and only one woman. Some are filled with guns, others devoid of weapons. Some are designed to gradually fall apart, demanding that their occupants constantly battle against degrading systems and rusting valves. Some released psychotropic drugs into the atmosphere ten days after the doors were shut. Just to see what happened.