Although this has been known for quite some time, Microsoft announced today that Photosynth has officially been shut down. However, there is a silver lining. Photosynth has already released the viewer code for the service and Photosynth is available as open source.
"It’s a sad day, but we knew it was coming. We closed the Photosynth service and Web site today. Key parts of the Photosynth code live on in other Microsoft products, and we’re proud of the influence Photosynth had on photo technology across the industry during its nine-year life."
It's been a long nine years for Photosynth, but it's good to know parts of it will live on in "other Microsoft products."