People don't do research on an iphone. They do it on their desktop or notebook or UMPC. I found some voice recognition software named Tazti speech recognition that actually is a free download and performs voice searches of Google, Yahoo, MSN, Wikipedia, Amazon, eBay and many other websites. It also lets me log into and navigate Facebook and Myspace by talking to my PC. It really works well.

Here's their youtube demo video: http://www.youtube.com/w​atch?v=C1tt_aeIAM8