Google Voice Search for iPhone no longer works exactly like it did in the past. If you installed iPhone 3.0 operating system, you may notice that lifting the receiver to your ear and speaking your command will no longer function with the current Google Mobile app for the iPhone.
This is a bit funny, in that Google admittedly broke Apple's rules by releasing such a feature. Specifically, moving the phone to your ear and having the application change to listen for you to speak, is not a supported developer feature in the iPhone SDK.
So when iPhone 3.0 OS came out, it seemed to have broke that neat feature.
Bret at Google posted in the Google Mobile Help discussion area that Google is aware of the issue and working on a fix. The iPhone application still works, but the feature where you put the phone to your ear no longer functions.
In fact, Bret said they submitted a new version to Apple, which is waiting for Apple's approval. Will Apple let this one slide through also?
Forum discussion at Google Mobile Help.