Microsoft Photosynth is updated with following new features and improvements to old ones. 

• Point Clouds in Silverlight will make the synth viewing experience much more awesome for Mac & Linux users. Take a look at the Silverlight Viewer here, and press P to switch the viewer into point cloud mode.
• Discussion Forum — Share your Photosynth ideas, get some photographic inspiration, ask a question or suggest a way to improve our technology.
• Photosynth homepage updated with new Icons, links, and latest post title.
• Your Activity Area now lets you see what synths you’ve commented on and if there have been any replies to your comments, in addition to latest comments on your synths.
• With More Explore Views, you can now filter down the most viewed and favorited synths to see what are the most popular synths that have been created in the last 7 days, 30 days or all time.