Begin reading at "As to searching the Photosynth forums".
You can use your browser's 'search this page' feature to find that phrase by holding [Ctrl] and pressing [F].
Be sure to study the link examples that I provide.
As to better forum software, the first Photosynth forum was hosted at
and has quite a few discussions. What's more, it still functions and gets answers from Photosynth team members today.
I'm not trying to discourage you from starting your own Photosynth fan site. I mean, I'm interested to see what you'll come up with, but I do like having consolidated places to find or give answers, for whatever that's worth.