From the press release:

The rock gods have spoken, and are pleased to announce further details on Activision, Inc.’s Guitar Hero II™ on the Xbox 360® video game and entertainment system from Microsoft, which will feature a variety of new exclusive downloadable content through Xbox Live Marketplace®, along with over 70 finger-melting tracks. The franchise that has rocked the video game industry is set to go on another highly-anticipated world tour this spring, and fans will now enjoy sharply remodeled HD visuals for the next-gen platform, and be able to shred their new Gibson-shaped X-Plorer axes to impressively pulsating audio sweetness on the Xbox 360.

Move to the top of my most wanted list!