Google's image search is a very different beast to their text search. It isn't continually updated in the same way, instead they seem to do an update every mon

Google's image search is a very different beast to their text search. It isn't continually updated in the same way, instead they seem to do an update every month or so. It's 1 month since wwdc when images of iphone 4 appeared, so it's possible that they just haven't done an update in that time.