  We present the results from multiple surveys for intracluster planetary
nebulae (IPNe) in nearby galaxy clusters and groups. We find that in the case
of clusters, our observations imply: 1) the amount of intracluster starlight is
significant, up to 20% of the total starlight, 2) the Virgo Cluster is
elongated along our line of sight, and 3) the intracluster light is clustered
on the sky, implying ongoing tidal stripping. In contrast, searches for IPNe in
groups have found little or no intra-group population, implying there may be
something in the cluster environment that significantly enhances intracluster
star production. From high-resolution N-body simulations, we find that the IPNe
should create observable features in position-velocity space, and that these
features may eventually allow us to place limits on the dynamics of galaxy
clusters.
