  We compare the measured peculiar velocities of 98 local (<150/h Mpc) type Ia
supernovae with predictions derived from the PSCz survey. There is excellent
agreement between the two datasets with a best fit beta_I (=Omega_m^0.6/b_I) of
0.55+-0.06. Subsets of the supernovae dataset are further analysed and the
above result is found to be robust with respect to culls by distance,
host-galaxy extinction and to the choice of reference frame in which the
analysis is carried out. Alternative methods of determining beta_I including
density-density comparisons, dipole measurements and WMAP-based results are
also discussed. We conclude that most recent determinations are consistent with
a value of beta_I=0.5.

Astrophysics