[ame]http://www.youtube.com/watch?v=Sz6v3aBzIgA[/ame]
The Innocase II Surface Combo is a nice case and holster combo for the iPhone 4. The case provides a high amount of protection, that should protect you from most low falls. If you are worried about the glass on your device, I suggest you get this case or one like it. The holster allows you to place your iPhone in with the screen facing inward so you don't get any unwanted scratches. The price for the combo is a bit high at $50, for me, the $30 part out for just the case is a good deal.
Combo:
Innocase II Surface Combo, Black For use with Apple iPhone 4
Just The Case:
Innocase II Surface, Black For use with Apple iPhone 4