Exactly what Paul Thurott said. However, I disagree for a few reasons.
1) The other iPhone "exchange" features: Remote Wipe, locate and lock. I doubt this could ever be duplicated by Google for the iPhone. Android, sure, why not, but not the iPhone.
If an Exchange Administrator can wipe an iPhone remotely, I think Google can provide users with the same functionality. Remote Wipe is a feature of Exchange ActiveSync, so hopefully that function can be also implemented by Google to allow us to nuke the data on our lost iPhones.
Just think if one day the ActiveSync specifications were enhanced to command the phone to provide its GPS coordinates, and to also lock itself. Apple would probably have to support it on the iPhone for corporations with tight ActiveSync policies requiring those hypothetical new policies.
ITG