  We present Hobby-Eberly Telescope (HET) observations for galaxies at redshift
z < 0.3 from the Sloan Digital Sky Survey (SDSS) showing large velocity
dispersions while appearing to be single galaxies in HST images. The high
signal-to-noise HET spectra provide more definitive velocity dispersions. The
maximum velocity dispersion we find is 444 km/s. Emission-line widths in QSOs
indicate that black holes can exist with masses exceeding 5 billion solar
masses, implying velocity dispersions greater than 500 km/s by the local black
hole mass - velocity dispersion relationship. This suggests either that QSO
black hole masses are overestimated or that the black hole - bulge relationship
changes at high black hole mass. The latter option is consistent with evidence
that the increase in velocity dispersion with luminosity levels off for the
brightest elliptical galaxies.
