Hi - I know you guys have followed the progress of Photosynth in the past and as you know this is a long term project but we wanted to provide a brief update. The latest update was in November when the team made a technology preview available, they have now added Firefox support. We know that you are waiting for the day when you will be able to use Photosynth, and that is one of the things the team is planning to still deliver, but in the meantime look for more photo collections and functionality to be added to the service in the coming months.
Tech Preview Site
Team Blog Site