Mel Martin from TUAW has a nice overview of Amazon’s latest iOS app, which utilizes the capabilities of their Amazon Cloud Drive for storing up to 5GB of photos for free from your iOS device.

Amazon offers more free storage than Apple, and Apple will only store up to 1000 of your photos for 30 days compared to about 2000 photos with no expiration from Amazon. With Apple, after 30 days you must sync to your main computer. I see the Amazon service as a nice extra backup to what Apple offers.

If you use Amazon Cloud Drive, you can also access documents, music, and photographs through the desktop application for transferring files to and from the web.