<< otterbox.com >>
This company in Fort Collins CO (looks like their products are "assembled in Mexico") makes a huge variety of decorative and protective cases for many phones, GPSs and other portable electronics. We bought their heavy duty Defender cases for our iPhones and I have Otter's armored cases for our office iPads.
OtterBoxes add bulk to your devices and this level of protection is not necessary for most casual users. But if you're taking your expensive toys into harsh environments (or you're the kind of person who drops their stuff onto concrete and watches in horror as it shatters) you want the insurance of a good case. These guys makes 'em in lots of colors and different levels of screen and impact protection and dust and water resistance.
The cases are functional, practical and good looking but it was OtterBox's excellent customer service and warranty protection that have won my brand loyalty.