  We determine the quasinormal frequencies for all gravitational perturbations
of the d-dimensional Schwarzschild black hole, in the infinite damping limit.
Using the potentials for gravitational perturbations derived recently by
Ishibashi and Kodama, we show that in all cases the asymptotic real part of the
frequency is proportional to the Hawking temperature with a coefficient of log
3. Via the correspondence principle, this leads directly to an equally spaced
entropy spectrum. We comment on the possible implications for the spacing of
eigenvalues of the Virasoro generator in the associated near-horizon conformal
algebra.
