  The transport properties of certain strongly coupled thermal gauge theories
can be determined from their effective description in terms of gravity or
superstring theory duals. Here we provide a short summary of the results for
the shear and bulk viscosity, charge diffusion constant, and the speed of sound
in supersymmetric strongly interacting plasmas. We also outline a general
algorithm for computing transport coefficients in any gravity dual. The
algorithm relates the transport coefficients to the coefficients in the
quasinormal spectrum of five-dimensional black holes in asymptotically anti de
Sitter space.
