Gedget: Eye-Fi - Transfer photos directly to Computer/Web from your camera
Eye-Fi SD Card automatically uploads pictures from the camera to Mac or PC (as well as on-line photo sharing site such as Flickr). The photos are transmitted wireless from your camera through home Wi-Fi network. Basically this eliminates the need to hook up your camera or memory card to a USB port to upload the images. There is also an adapter to use the Eye-Fi SC card on some CF digital camera.