Play Sigma Demo Recieve Reward

As if PS3 owners didn't have enough reasons already to play the incredibly awesome Ninja Gaiden: Sigma demo, Team Ninja is giving us yet another. IGN writes that in the full version, you will be rewarded with an amount of in-game currency (Yellow Essence) depending on how far you've gotten in the demo, allowing you to purchase power-ups and items at the very beginning of the game. Did you unlock Rachel's level? Well you'll get a nice little bonus waiting for you when you start up the final version.
[From PS3 Fanboy]

P.S.: Ninja Gaiden: Sigma is assumed to be a PS3 exclusive, although it has been denied many times by Team Ninja, no "official" confirmation that it will not come to the 360 has been made at this time.