Google April Fool's Day 2004: Google Lunar Jobs
"Google is interviewing candidates for engineering positions at our lunar hosting and research center, opening late in the spring of 2007. This unique opportunity is available only to highly-qualified individuals who are willing to relocate for an extended period of time, are in top physical condition and are capable of surviving with limited access to such modern conveniences as soy low-fat lattes, The Sopranos and a steady supply of oxygen.
The Google Copernicus Hosting Environment and Experiment in Search Engineering (G.C.H.E.E.S.E.) is a fully integrated research, development and technology facility at which Google will be conducting experiments in entropized information filtering, high-density high-delivery hosting (HiDeHiDeHo) and de-oxygenated cubicle dwelling. This center will provide a unique platform from which Google will leapfrog current terrestrial-based technologies and bring information access to new heights of utility."
If you emailed Google about the supposed jobs, you would've got an auto-reply:
"Thank you for contacting Google about our Copernicus Research Center.
We've received an overwhelming response to this opportunity and are not currently accepting additional resumes. We will, however, keep your information on file should we have an opening in the future. At the current staffing levels, we anticipate that we may need additional applicants on or around April Fool's Day in 2104. Until then, we appreciate your interest in Google and your taking the time to write us.
The Googlunar Recruiting Team"
Google April Fool's Day 2000: Google MentalPlex
Google April Fool's Day 2002: PigeonRank
Google April Fool's Day 2005: Google Gulp
Google April Fool's Day 2006 - Take A Guess