From the “Learn something new and useful each day” file:
“Sure, it’s great that all you have to do to silent your iPhone is flip the switch on the side, but then you’re at a loss for telling the difference between an important business call and your neighbor who’s looking for someone to watch his dog. Fortunately, iOS 5 offers…”
Read more at: Creating custom vibration alerts in iOS 5 | iLounge Tips.