The best new visual technologies relating to photography from Siggraph.
Finding Paths through the World’s Photos
This is similar to Microsoft’s photosynth technology.
And what I think is really cool and could be the digital camera technology of the future:
Programmable Aperture Photography: Multiplexed Light Field Acquisition
This means that it looks like someone’s worked out a method of digitally refocussing, readjusting the depth of field, and slightly changing the tilt and pan of a photo that has already been exposed.
Instead of having a single hole aperture, they replace it with an array and.. well.. watch the video 
Lastly this method of editing objects in video is brilliantly simple.
Microsoft Unwrap Mosaics
via HackADay