Web Guide - People
Website of the Biography Channel. Sketchy but numerous biographies.
Biographies of celebrities.
Dead Peoples' Server
Very brief biographical information.
Includes famous people from all walks of life.
Find a Grave
A bit morbid, but a useful site. Search by name, location, or "claim-to fame."
IPL Biography Link Page
Star Address Book
Courtesy of TV Guide.
Who's Alive and Who's Dead
A neat site, with personality, that does exactly as it claims to -- tells you who is alive and who is dead. The author lists the sources on the links page.