After going through the Samurai Warriors 2 Xtreme Legends Mini-Site and getting all psyched for it's release on the XBox LIVE Marketplace, this hit me like a kick in the nuts:

From Koei's US site:
"Samurai Warriors®2 Xtreme Legends® (SW2XL) for Xbox 360® will not be available on Wednesday March 19th, 2008 due to operational delays within Xbox LIVE® Marketplace. We will make further announcements when Samurai Warriors 2 Xtreme Legends is ready for download. Please accept our sincere apologies. SW2XL for PlayStation® is available now."

Brilliant - good thing I have some grind achievments in Dynasty Warriors 6 to finish...