Since last week I have a new digital SLR camera: a 15 megapixel Canon EOS 50D. With it I took my first photo set with Photosynth in mind. I am very happy with the result: 98 photos that are 100% synthy (meaning that they all connect into one seamless 3D scene).
Here is a screenshot of this scene of the main hall of the train station in Leeuwarden:
Of course, this synth is best experienced live because then it is fully navigable. You can move around using the mouse, cursor keys or keyboard shortcuts. Also try to zoom in. Fifteen megapixel pictures give you quite some leeway for zooming into details.
Have you created a nice synth? Leave the link as a comment so that I can check it out.