A few years ago, I started making offset headers for the Arduino. These headers allow you to make shields using standard-spaced perfboard, by correcting the shift of that one strangely-placed Arduino header.
With the introduction of the Leonardo, The Arduino team kept the shift of the header, but added two pins to it.
To keep up in this offset header arms race, I ordered some 10-pin headers and modified my fabrication process to accept the two extra pins. I expect these to find their way into the hands of fine retailers over the next couple of months.