  We first construct a consistent Kaluza-Klein reduction ansatz for type IIB
theory compactified on Sasaki-Einstein manifolds Y^{p,q} with Freund-Rubin
5-form flux giving rise to minimal N=2 gauged supergravity in five dimensions.
We then investigate the R-charged black hole solution in this gauged
supergravity, and in particular study its thermodynamics. Based on the gauge
theory/string theory correspondence, this non-extremal geometry is dual to
finite temperature strongly coupled four-dimensional conformal gauge theory
plasma with a U(1)_R-symmetry charge chemical potential. We study transport
properties of the gauge theory plasma and show that the ratio of shear
viscosity to entropy density in this plasma is universal. We further conjecture
that the universality of shear viscosity of strongly coupled gauge theory
plasma extends to nonzero R-charge chemical potential.
