  Procesi bundles are certain vector bundles on symplectic resolutions of
symplectic quotient singularities for wreath-products of the symmetric groups
with Kleinian groups. Roughly speaking, we can define Procesi bundles as
bundles on resolutions that provide derived McKay equivalence. In this paper we
classify Procesi bundles on resolutions obtained by Hamiltonian reduction and
relate the Procesi bundles to the tautological bundles on the resolutions. Our
proofs are based on deformation arguments and a connection of Procesi bundles
with Symplectic reflection algebras.
