For a while, the Ninja Gaiden II page on Xbox.com advertised the demo's arrival date as May.  As in this month.

Well, it's the end of May and North America still hasn't seen the demo pop up on LIVE yet.  Okay, so it did come out today -- in Japan. 

Now someone remind me: exactly how many people in Japan own Xbox 360s?  And of those people, how many are actually going to download the Ninja Gaiden demo?

According to Joystiq, Chris Paladino of Microsoft's Gamercore blog confirmed that the demo has not been dated for the rest of the world, only that it would be available to us "soon."  However, Joystiq mentions in their article that the demo should be out sometime next week, and 360 owners across the globe will be able to get an early taste of this hi-def gore fest.

As for Xbox.com, the statement "Get your hands on the free demo coming to Xbox LIVE Marketplace in May" was removed earlier this week to avoid further confusion.