If the above comments are put into practise, I would say that some sort of menu in the authoring/editing menu of a synth should be available to start a conversation around it in the forum. This could, if presented correctly, be a way to spark feedback on a synth that might otherwise be overlooked.
I imagine that it would be very useful for beginners to be able to call out to the community for help simply by choosing things such as "Did this not turn out as well as you had hoped? Ask the rest of the Photosynth community how to make this synth better next time." or "Proud of this synth? Ask other people who use Photosynth what they think.", filling out an initial question (in the same manner as starting a new thread here), and having a thread in the appropriate forum be automatically generated.