Ecamm Network has released iPhoneDrive, its new Mac OS X application which lets the iPhone be used for file storage. It features drag and drop, making it fast and easy to move files back and forth between the Mac and iPhone. Another feature is the ability to copy entire folders to and from the iPhone with a single drag. Possible uses include moving files between work and home, backing up important data, and keeping useful apps and installers with you at all times. iPhoneDrive is priced at US$ 9.95, and a free demo is available.