I wouldn’t say that I use it terribly often, but Google Goggles is an amazing little app. I take a picture of something — almost anything — and it will recognize what it is. If it’s a product, I can then do a quick online search for reviews and pricing information. eBay wants to do the same thing with its mobile apps.
Google is one step closer to reading your mind. They revealed several new features for mobile yesterday that will make searching easier, faster and more predictive to the point it feels like they’re probing your brain.