In 2007 I thought that my 8GB iPhone was as large as I would ever need. Two and a half years later and Ive already filled up the 16GB storage of my iPhone 3GS. Enter AirStash, an expandable flash drive via SD memory that you will be able to access from your iPhone. Simply plug AirStash into your Mac, drag and drop some files to the mounted volume, and head then out the door with AirStash and iPhone in your pocket.

Website: http://www.tuaw.com/category/iphone/