  We show that a model based on a D3-brane--anti-D3-brane system at finite
temperature, proposed previously as a microscopic description of the
non-rotating black threebrane of type IIB supergravity arbitrarily far from
extremality, can also successfully reproduce the entropy of the rotating
threebrane with arbitrary charge (including the neutral case, which corresponds
to the Kerr black hole in seven dimensions). Our results appear to confirm in
particular the need for a peculiar condition on the energy of the two gases
involved in the model, whose physical interpretation remains to be elucidated.
