  We compute the exact gravitational quasinormal frequencies for massless
topological black holes in d-dimensional anti-de Sitter space. Using the gauge
invariant formalism for gravitational perturbations derived by Kodama and
Ishibashi, we show that in all cases the scalar, vector, and tensor modes can
be reduced to a simple scalar field equation. This equation is exactly solvable
in terms of hypergeometric functions, thus allowing an exact analytic
determination of the gravitational quasinormal frequencies.
