Well there goes the rest of my day… :) Photosynth is now out of private beta at photosynth.net. You can now sign up for a photosynth account to create your own synths and there are a host of new ones to browse.
There are a few things to keep in mind at the moment, all synths are public and you can only use Windows PC’s but I’m looking forward to trying it out. There might be a synth of my office up there soon…!