OpenBSD 4.3 is including PJSUA
http://www.pjsip.org/pjsua.htm
I tried it and I really like it. If you compare various SIP clients you
should see that PJSUA should be a first
choice for security minded user which prefers simplicity and capability
instead of GUI non-sense.
I personally would much rather see you and other people interested in
phone applications taking part in testing and
making sure PJSUA works as expected than waisting time trying to port
another SIP client. At least for now, I think
that community should really help to make sure OpenBSD has fully working
simple SIP client.
Cheers,
Predrag Punosevac