If you would like a sample set of images to use for a synth, you may use my photos of a fire hydrant which you can download here:
Be sure to use the Direct3D viewer in Internet Explorer for the best viewing of the Photosynth point cloud.
You can find the link to the Direct3D viewer in the lower left corner of any photosynth's view page (or you can substitute 'view.aspx' in the URL for 'd3d/photosynth.aspx')
You can find full keyboard controls for the Photosynth viewers at the end of the Photosynth Photography Guide, available for download from this help page:
For more tips on how to shoot photosynths, please visit http://bit.ly/sinkorsynth
If you need more answers, please feel free to ask more questions.
From one Photosynth user to another,