Here's my first --almost successful--pan...
Nikon D300, 10.5 fisheye, NN5, Manfrotto 3021 head, PTGui
As you can see, I have still lots to learn on taking/processing the Nadir shots:
-Missing data (from the tripod not moved far enough apart between nadir shots???)
-misaligned tiles (should I be expecting them to be perfect, or are my expectations too high?)
-shadows from the tripod