Keys, Artifacts, Special Bosses.

Check the stickys.

Ah my bad, Didn't notice it. Whoops.

That's a pretty inadequate guide anyway. Some things to add would be:

Strategies for killing the keyholders/ubers/ubertrist
Chances for certain things to drop
More accurate information(Uber trist isn't populated just by Uber Diablo, as the guide implies)
Information about the Standard of Heroes, which isn't even mentioned in the guide