Aha, this may be the problem! I have set the Orecchiette package controls to be dependent on the GStreamer "base" plugins set, but it looks like audiopanorama is in the "good" plugins set. Let me see if I can change that, and have the installer find the correct package automagically...

EDIT: Ok, I have pushed up a new version of Orecchiette, which should (fingers crossed) have added the correct magic into the control file to make it dependent on the GStreamer "good" plugins. It should eventually make its way to the extras-testing repository. I haven't yet tested to see if HAM does indeed correctly pull down the right package (I'll try to do that later today), so it may or may not work...

EDIT 2: Ok, I think HAM has no problems with the dependencies of version 0.3.8, so hopefully it will pull down the correct plugins now. But please tell me whether it works or not for you!