I'm just now discovering Photosynth, and it amazes me. I've watched the video tutorial and read quite a few of the posts here. I'm gonna try not to just rehash old issues, but I'm afraid it's inevitable.
For my first attempt at a synth, I found a building nearby that is a former Monastery. Looks like beautiful textures, interesting features to me. So I experimented with some things. I'm not sure how to post a link to my synth, but it should be in my profile if you click on my name.
I'm THRILLED to see that my attempt at starting outside, then zooming in on the door, then opening the door, then going inside the building worked exactly as I'd hoped. I see a beautiful point cloud of that side of the building, and I was able to line it up with the satellite image.