  We give a status report on the theory of resummed quantum gravity. We
recapitulate the use of our resummed quantum gravity approach to Einstein's
general theory of relativity to estimate the value of the cosmological constant
as $\rho_\Lambda=(0.0024{\mathrm{eV}})^4$. The estimate is made in the context
of the Planck scale cosmology formulation of Bonanno and Reuter. We discuss the
constraints on susy GUT models that follow from the closeness of the estimate
to experiment. Various consistency checks on the calculation are addressed and
we use the Heisenberg uncertainty principle to remove a large part of the
remaining uncertainty in our estimate of $\rho_\Lambda$.
