http://www.google.com/mobile/goggles/#place
But as per the other response here, I'm not sure it's using the video so much as the location and orientation to deliver results.
I'd like to see a version, like the still-photos, whereby the search engine is translating in real time as new objects enter the frame.
While I'm at it, I'd like it to perform these tasks with a T-800-style HUD.
Droid indeed.
http://www.google.com/mobile/goggles/#place