Not sure about Europe but the North American PSN store the Razor's Edge demo is up. Go get it!
So, first off inital impressions are that it is WAY harder even on normal than the other game. The combat just "feels" more like a Ninja Gaiden game now. Actually stuck on the end of Ayane's portion of the demo these damn Alchemists are fucking brutal! Pretty excited for this now. Its still not going to beat Ninja Gaiden Black but at least this version seems like it way more on par with what Ninja Gaiden 3 should have been the first time. Liking it alot! I heard you can unlock Kasumi if you beat both of the levels. Also,everything you unlock in the demo transfers over to the retail game so that is a neat added bonus.