The perfSONAR-PS project celebrated a milestone by surpassing 1000 deployed software instances in December of 2013.  The perfSONAR software is designed to assist network operators and end users with the task of monitoring end-to-end performance, and assisting with debugging tasks in the event that problems arise.  As the number of deployments grows, the software becomes more effective by offering better coverage across more network paths, including ESnet and the connectivity to Department of Energy and NSF funded resources.  perfSONAR-PS is a joint effort between ESnet, Fermilab, Georgia Tech, Indiana University, Internet2, SLAC, and the University of Delaware.