Google has a cool new feature for India - Google SMS. You can send a search query by SMS & get back results by SMS without paying any premium charges. Considering that a majority of Indian mobile users don't have handsets that support Internet browsing, this should go well with tech savvy folks who need answers on the go. Let's say you wanted the dollar-rupee conversion rate, type 1$=?INR & send to 9-77-33-00000. The results will be delivered by a return SMS.
Google has also added voice search to Google Mobile App for the iPhone.
..just say "18 percent of 33 dollars" and get a Google calculator answer back that it's 5.94 dollars
I just hope the app doesn't learn to talk back. Imagine, if it say's - What? You don't know that?