Doug's Inner Net News: SIP and JXTA: "SIP is complex. JXTA is relatively simple. I'm not exactly sure why that is so. SIP is used for call control in IP telephony, and call control in the PSTN is complex. But I have to wonder if SIP would not have been simpler if it had started with a model of peer-to-peer communication like that in JXTA. If I were to start work on a new peer-to-peer protocol, I would consider building upon JXTA."