That's pretty cool.

Interestingly, most people using an Android phone can do that without the use of a computer or scanner.

The only caveat being that you may need the same QR app to decode it. I generated mine using QR Droid Private. Two other apps weren't ale to decode from the image so I'm assuming they'd also choke when scanning. QR Droid was able to decode it.

Man, that's got to be the largest QR code I've ever seen!