mixture-of-Gaussian image descriptions

In a many-hour delay in Madrid airport at gate U58, I re-hashed the CMML workshop for a group of New-York-bound machine learners who were in other workshops, but who (today) had nothing but time (thanks mechanical issue with airplane). I then tried to do some of the math that Marshall and I had been waving around yesterday. I think we might have some conceptual issues. The plan is sound, way sound, but we might not be able to transfer probabilistic information with quite the fidelity we had in mind yesterday.