  Intracluster planetary nebulae are a useful tracer of the evolution of
galaxies and galaxy clusters. We analyze our catalog of 318 intracluster
planetary nebulae candidates found in 0.89 square degrees of the Virgo cluster.
We give additional evidence for the great depth of the Virgo cluster's
intracluster stellar population, which implies that the bulk of the
intracluster stars come from late-type galaxies and dwarfs. We also provide
evidence that the intracluster stars are clustered on the sky on arcminute
scales, in agreement with tidal-stripping scenarios of intracluster star
production. Although significant systematic uncertainties exist, we find that
the average fraction of intracluster starlight in the Virgo is 15.8% +/- 3.0%
(statistical) +/- 5.0% (systematic), and may be higher if the intracluster
stars have a large spatial line-of-sight depth. We find that the intracluster
star density changes little with radius or projected density over the range
surveyed. These results, along with other intracluster star observations, imply
that intracluster star production in Virgo is ongoing and consistent with the
cluster's known dynamical youth.
