University of California
Ucmp: Learning About Vendian Animals
UC Berkeley offers very nice photos and descriptions of what is known about fossils of animals from this era.
Other
Georgia Perimeter College: The Precambrian Era
This resource provides detailed information on each of the periods within the Precambrian Era. It discusses what earth was like, what the first multiple cell organisms were like and when they appeared.
The Field Museum
Field Museum: Exhibits: Evolving Planet: Precambrian
This interesting tour examines how life began on earth, provides images of the first life forms, and delves into the role that photosynthesis sexual reproduction, and natural selection played in the the Precambrian period. Listen to...