  Mergers of spinning black holes can give recoil velocities from gravitational
radiation up to several thousand km/s. A recoiling supermassive black hole in
an AGN can retain the inner part of its accretion disk, providing fuel for
continuing AGN activity. Using AGN in the Sloan Digital Sky Survey (SDSS) that
show velocity shifts of the broad emission lines relative to the narrow lines,
we place upper limits on the incidence of high velocity recoils in AGN. Brief
but powerful flares in soft X-rays may occur when bound material falls back
into the moving accretion disk.
