CNN is asking anyone at the Inauguration this Tuesday to take digital photos (under 10 MB), send them to themoment@cnn.com, and let CNN use PhotoSynth to create a 3D experience with the software.
See http://i.gizmodo.com/5133724/contribute-to-cnns-photosynth-3d-collage-of... for more details.
CNN: http://www.cnn.com/
PhotoSynth: http://livelabs.com/photosynth/