Microsoft photosynth provides a great platform to share photos in 3D. First, you need a Windows Live ID or Passport account to sign up the photosynth. 20GB of storage spaces are given to each account and it's a free service. After installing the photosynth in your computer, all you have to do is to follow the instruction carefully while shooting to ensure a 100% 3D synthed image. Microsoft Silverlight is needed to view a synth.
Here is an example of my recent synth: Notre Dame Basilica Montreal
Further reading: http://www.ted.com/talks/blaise_aguera_y_arcas_demos_photosynth.html