This research is partially supported by NSF Grants IIS0205489, IIS0219909 and EIA0130422. The authors acknowledge the many valuable insights provided by
Bobby Bhattacharjee, Samir Khuller, and Galit Shmueli.
We acknowledge Qing Lu
(Maryland) who modified the Java Handle client.
Stefan Seltszam (Passau) and Dani Arbel and Ido Peled (Technion)
assisted in the performance monitoring experiment.