It'll be rolling out free of charge to App Stores worldwide today, but since it requires an auto-focusing camera, it's supported only on iPhone 3GS and iPhone 4 running iOS 4 or above. The pain of progress, we guess.
So glad it's come to the iPhone. Goggles is awesome.
No support for iPhone 3G. Boo!
Doesn't do anything amazing that I can't already do with regular search but nice that it's there.