The term "unified field theory" was coined by Einstein, who was
attempting to prove that electromagnetism and gravity were different manifestations of a single fundamental field. Although electromagnetism and the strong and weak nuclear forces have long been explained by a single theory known as the standard model, gravitation does not fit into the equation. The current quest for a unified field theory (sometimes called the holy grail of physicists) is largely focused on superstring theory and, in particular, on an adaptation known as Mtheory. 
Author John P. Lynch
Explains some of the problems with the Standard Model of the Universe, and offers an alternative at: http://www.extremethinking.net/dimens... 

Grand Unified Theory of Everything

Gresham College
The title here may not have translated well, the concept being that as advances continue towards unification the value of Spacetime will become less of a factor in the final equations. Here it will be left to the student of theoretical physics to determine the validity of such a statement.
This video is a comprehensive presentation of the multiple factors involved for a basic understanding of our universe. About Gresham College
Gresham College exists for the sole purpose of disseminating knowledge to the public through free lectures. This four century old tradition continues today with the three or more lectures a week being made available for free download from our website: http://www.gresham.ac.uk 

Lisa
Randall is Professor of Theoretical Physics at Harvard University and
is one of the most cited and respected scientists working today. 