Some people seem to understand it faster than others. It took me a while to understand the sort of detail that Photosynth wanted in order to make a good point cloud and make good strong matches between groups of photos.
I see that you've latched onto the 'panorama' style with a vengeance. =]
You actually came really close to finding its true potential with your 'Pot' synth ( http://photosynth.net/view.aspx?cid=bc340659-dbcb-416d-8e53-9e07c2c1e753 ). You just chose a really difficult subject to get to work (between the shiny glass table, shiny pot, and blurry background Photosynth didn't know what to do with it).
I would strongly encourage you to try the same technique you tried with the pot but with a less shiny subject. I saw some wooden posts in your garden that have been painted green with a bit of peeling paint, a wooden lattice in the garden, and some brick walls that should show you a little more of what Photosynth is capable of.
Let us know how it goes!