A couple (unhelpfully unconfirmed) issues:

I suspect that the Harmattan dspbridge/gst packages may cause Skype video calls to immediately disconnect when the other side sends video. Tried with Vista and Debian callers. The in-set self-video works fine, but as soon as video is to be transferred, the call disconnects.

My phone has also been dying at strange times -- like, during calls, context switches. Battery life doesn't appear to be the issue.

Will post when I've learned more. If there are any particularly helpful logging techniques I might try (other than network syslog), let me know.