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Go to google.com/humans.txt and you will find a text file that aims at recruiting new talent at Google. The file reads:
Google is built by a large team of engineers, designers, researchers, robots, and others in many different sites across the globe. It is updated continuously, and built with more tools and technologies than we can shake a stick at. If you'd like to help us out, see google.com/jobs.
Here is a picture:
Image credit: Google OS
As I said at Search Engine Land it reminds me of when the DailyMail used their robots.txt to recruit SEO engineers.
Forum discussion at Google Blogoscoped Forums.
