Innovative--or at least creative--recruiting

Slashdot posted a story about a sign in Cambridge, MA that poses a mathematical riddle which, when solved, leads to a website which poses yet another riddle which, when solved, ends up being a recruiting pitch for Google.

Google actually seems to be doing a lot of this--the current issue of Dr. Dobb's Journal has a leaflet in the middle which is several pages of strange or difficult (or both) questions and a postage-paid envelope. The envelope is addressed to Google, and encourages you to include your resume with your answers. This isn't the first time Google has used this particular billboard, either. And of course other companies have used similar, if not quite so difficult to solve, tricks as well.

I find this really interesting. Most companies act as if it's the potential employees' job to find and interest them, not the other way around. I don't live in any of the places they're hiring people like me for, but if I did I know this would pique my interest.