  A lattice calculation is presented for the electrical conductivity of the QCD
plasma with 2+1 dynamical flavours at nonzero temperature. We employ the
conserved lattice current on anisotropic lattices using a tadpole-improved
clover action and study the behaviour of the conductivity over a wide range of
temperatures, both below and above the deconfining transition. The conductivity
is extracted from a spectral-function analysis using the Maximal Entropy Method
and a discussion of its systematics is provided.
