The first filter that is applied to the height map is a simple Gaussian blur, which the GPU handles with ease, but which -- if left to its own devices -- would simply smooth out all the dramatic extremes in the height map and leave us with a bunch of bland rolling hills.
The hack is a simple cross-site scripting vulnerability, a flaw in how Skype handles user input and prevents it from being interpreted as commands on the target machine.
In fact, we've found it hampers our workflow when attempting to compose an email or a simple text in Google Voice -- something the keyboard's Swype-like input mode handles with ease.