Mobile-Friendly Short URLs with Wag.gd

A few weeks ago I quietly launched Wag.gd, which is what I like to think of as a mobile-friendly URL shortening service. It's "mobile-friendly" in the sense that the URLs which it generates are designed to be exceptionally convenient to type on a standard mobile handset keypad. It's time to introduce the service to the wider world, and look in a bit more depth at what I've tried to achieve with the site and how I've gone about it.