Photosynth, a Microsoft Live Labs project previously available as a view-only tech preview, now lets those signed up with Windows Live upload and create their own multi-photo walk-through panoramas. The webapp, which requires an 8MB software installation on the user's side, can stitch together dozens or hundreds of photos and then let viewers "walk" through them, altering perspective and creating entirely new views from the details of all those shots. That means you not only can show off your new workshop shed in your backyard garden, you can let viewers actually step into it and look around. Pretty cool stuff, although those uploads, and the software itself, can take up a bit of bandwidth and memory. Photosynth requires a free download and a Windows Live ID to use.