So today my goal was to set up a test call so that I can better observe how SIP communicator handles incoming calls. This turned out to be a little more challenging than I had hoped.
One of the big reasons that I've used Skype in the past instead of an SIP client is that I don't have a public IP address due to the fact that I am behind my campus NAT. So I need to find a way to set up SIP communicator to make a call either over a LAN or over the local machine. Since this is not the normal operation of SIP communicator, there's no obvious way to set this up. I asked for guidance on the dev mailing list, which also served as a decent excuse to introduce myself.
Let's hope that I can figure this nonsense out tomorrow.