I just heard about the PS2 Samurai Champloo game. Check out the preview here! Samurai Champloo game
It looks like a generic hack and slash game but they've apparently tried to incorporate a combo system, where you create combos using a mixture of button sequences and music. You choose different tracks to play in the background during the game and the track you play affects the combos and moves that Mugen and Jin use.
The one thing that really impresses me is the look of the game. The video clip on the site above shows that fighting is smooth and looks stunning. I'm hoping they'll release this in Europe as well on the PS3 :P