Everyone loves the instant gratification of digital photography; press the button, wait a second, and see your snapshot on the camera screen. But getting those photos someplace useful can be a chore: dig into your desk drawer for the appropriate cable, find an open USB port on your computer, and open up the photo-sync software to move pictures onto the computer. (If you share photos over the Internet, additional steps are required.) Now, however, a new gizmo streamlines the process. The $100 Eye-Fi looks just like the memory card you already slip into your camera to store pictures, but it has a second function built in: It can be set up to communicate wirelessly with the computer of your choice, automatically downloading new photos whenever the camera’s within range — no cables required, no need to open software yourself. It can even go further if you’d like it to: The Eye-Fi can be programmed to automatically move your images directly to a web-based picture sharing site like flickr or Picasia; it can slap them onto your Facebook page; it can even submit them to a pay-per-print service like Costco. Just be sure you’ve deleted any blurry or embarrassing pictures from your camera before you get it near the computer — the Eye-Fi, after all, doesn’t know the difference between a family-friendly photo and one that could get you fired.