Eye-Fi has now updated their free iPhone, iPod Touch app to now support iOS 4. You do need a Eye-Fi card to use the app even though the Apple devices dont use the card to transfer the media.
The Eye-fi app allows you to transfer photos and videos from your device to popular photo and video sharing sites, including: Facebook, Evernote, Flickr, Kodak Gallery, MobileMe, Movable Type, Picasa, Photobucket, YouTube to name a few.
The app uses the built-in geotagging of the iPhone or iPod Touch, supporting programs like iPhoto 09 and geotagging-friendly sites such as Picasa and Flickr.
Eye-fi cards are available to purchase from Amazon from $49.