I just want to remind you that September 30th will bring the end of the free Case for your iPhone 4 program from Apple.
I got a free case from Apple about 2 days after I ordered from Apple.
What’s funny is that you get to install an App. on your iPhone in order to make the request for your case of Choice.
I ended up choosing the Bumper in Black.  

Apple Free iPhone 4 Case Program

Apple Free iPhone 4 Case Program

I guess this is a clever way for Apple to insure that you really had an iPhone 4 that was bought before the end of September and that you have only ordered one case.  Yes, there is an App. for that.
There are various styles to choose from and not just Bumpers.
The bumper is nice because it has metal switches for sleep and the volume controls.
The one problem I had is that my AV Cable that I was using to listen to my iPhone in my car is too big for bumper 30 pin usb connector on the bottom of the iPhone when the Bumper is installed.
Apple iPhone 4 case program thanks you

Apple iPhone 4 case program thanks you