Tech bloggers have recently unearthed an easter egg of sorts inscribed into the installer discs. The easter egg is an image -less than 1mm in size- depicting a trio of grinning men who are said to have worked on Vista. Conspiracy theorists have all ready gone through various theories on Microsoft's real plans for printing the image.
Although Microsoft maintains that the image just enchances the anti-piracy protection in addition to the already included shiny holograms in genuine Microsoft products. Like that would do anything to stop pirates, eh Microsoft? =)