openphotovr is a flash based web application which allows people to
crowd-source images of e.g. famous buildings.
see http://openphotovr.org/
Sadly, openphotovr doesn't have automatic matching of images. New images need
to be added by hand.
The idea is use bundler to get the SfM right and use pixelstruct to et the data
that is needed for openphotovr.
Maybe this is just a silly idea. :)