Google has updated their Google Mobile App for iPhone to now support the iPad and take advantage of the iPad user interface. Truth be told, there are not that many changes from the iPhone version to the iPad version except for a overlay search suggestion tab, larger screen real estate and Google showing the standard search results, as opposed to the iPhone version of the search results.
Like the iPhone version, most of the features send you out to Safari, the browser on the iPad/iPhone and have you work in the browser. Here are some screen shots from my iPad:
