Want to know if you are getting the best price possible for that stuff you really must have? Google's added a customized Product Search view for iPhones and Android handsets.
The price comparison tool itself is pretty familiar, and lets you re-order by price, availability, seller rating, and other criteria from a right-hand menu. There are, of course, other ways to compare prices on the run—Amazon's own iPhone app and SMS capabilities, among them. But if you're a Google fan, Product Search should fit nicely into your routine. Below is a rather cheesy demonstration video.