Provide better usage instructions. #1
Description
For most users of Laravel 4 they're used to simply registering the service provider in app/config/app.php. Your usage example is fine for registering the provider and passing in the config at runtime. I think a section explaining that creating an app/config/aws.php config file and simply adding the service provider to the array in app/config/app.php will yield the same result.
That's a more real usage for the majority of users.