After some delay, finally PJSIP version 0.5.10 is released, and it contains new features such as Python language binding for pjsua-api, experimental TLS support, Visual Studio 2005 support, explicit SIP transport binding, and various other enhancements as well as tons of bug fixes.
Download it as usual from http://www.pjsip.org/download.htm.
pjsip blog 