  We investigate the Mott transition using a cluster extension of dynamical
mean field theory (DMFT). In the absence of frustration we find no evidence for
a finite temperature Mott transition. Instead, in a frustrated model, we
observe signatures of a finite temperature Mott critical point in agreement
with experimental studies of kappa-organics and with single site DMFT. As the
Mott transition is approached, a clear momentum dependence of the electron
lifetime develops on the Fermi surface with the formation of cold regions along
the diagonal direction of the Brillouin zone. Furthermore the variation of the
effective mass is no longer equal to the inverse of the quasi particle residue,
as in DMFT, and is reduced approaching the Mott transition.
