Project Natal is, if you hadn't worked it out by the whole "project" bit, simply a working title for Microsoft's upcoming motion sensing peripheral. What's its actual name? We don't know, but we're about to find out.
A report on Edge says that Natal's final, actual name will be revealed as part of Microsoft's E3 showcase. Which is a bit of a shame. Like Nintendo's public code names, I'd grown quite attached to the whole "Natal" name, and will - for a while at least - have trouble calling it anything else.