Eye-Fi, best known for its Wi-Fi SD cards, has revamped its free iPhone/iPod touch app to work exclusively with iOS 4.x, allowing wireless transfer from the handheld devices to both a user's computer and some of the popular photo- and video-sharing sites on the web. The free app is only functional for registered owners of an Eye-Fi card (even though the card is not used in conjunction with the app) who have set up a free account with the company's website.