[iMore.com]

While it's fun to browse the App Store, iTunes Store, and iBooks Store, sometimes you just want to find what you're looking for.
For those occasions, for when you know exactly what you're looking for and you don't want to so much as tap or type, there's Siri. Simply hold down the Home button, call up Apple's personal digital assistant, and have Siri do the searching for you. Here's how!

Full story from the iMore Blog...