Quick! Run, don't walk (virtually speaking), to Sellout.woot, where you can score an Eye-Fi Connect X2 4GB memory card for $19.99, plus $5 for shipping.

What's the hurry? This deal is available today only, and while supplies last. (If you miss out, stick around--I'm going to explain why you'll want to get one even if it costs you a little more.)
The Eye-Fi has long been one of my favorite digital-camera accessories, for the simple reason that it solves one of life's biggest digital-camera hassles: copying photos from your camera to your PC.

Typically, you either have to dig out the right USB cable or pop the memory card out of the camera and into the PC (a process that can lead to corrupted media and lost photos).

The Eye-Fi is a regular-size SecureDigital (SD) card that somehow packs in a Wi-Fi transmitter. Translation: it can wirelessly beam photos (and videos) from your camera to your computer--and/or to any number of online sites, including Facebook, Flickr, and various photo-processing services. Plus, it fits the vast majority of digital cameras.

I especially like the companion Android and iOS apps, which let you transfer photos directly to your smartphone or tablet--even if there's no Wi-Fi hotspot around.

Usually the Eye-Fi cards start at around $50, so $19.99 is a pretty spectacular deal. That price buys you a refurbished Eye-Fi Connect X2, but no matter: the company backs it with the same one-year warranty as a new one.

Self-proclaimed cheapskate Rick Broida has been a technology writer for over 20 years. He has authored over a dozen books, including, most recently, "How to Do Everything: Palm Pre." Currently he writes the Cheapskate blog.