Google's Search app just received a nice update for iPad, bringing some nice interface enhancements. This includes Google Instant, which is better late than never, but you'll probably find the other stuff more exciting.
For example, you can load a web page in a side tab after you search and then swipe back to your search results to look for other pages while that side tab is loading. The app also features a pretty slick image viewer that's in a similar style to Apple's cover flow but a bit more practical. If you want to look up any of your past searches you can with a visual search history browser. You also get easier access to existing search tools and other Google Apps.
This update is available now, for free, in the iTunes App Store. Check out the video above for a demo.
Google for iPad [iTunes App Store]