This was on engadget yesterday:

http://grail.cs.washington.edu/projects/videoenhancement/vid...

It's from Eurographics 2007, not siggraph. But the video demo is pretty amazing.

In case anyone is interested, the main site - http://kesen.huang.googlepages.com/ - lists papers from many graphics conferences. An excellent resource.

Unbelievable. A link to an ACM paper that you don't have to pay to read. What's next, open access to IEEE publications?