The animation and map styles (road|arial) work as you'd expect, but somehow it looks a lot cooler with this little bit of code added :-)
<PlaneProjection RotationX="-60" />
BTW, it seems to me like addition of 3D
Projection(rather than a complete 3D environment, ala Kit3D and WPF) is the minimum they needed to add to get Photosynth working "natively" in Silverlight (instead of the current Silverlight-Photosynth beta which does use Kit3D)? ... hmmm ...