Does not seem to be available online, instore only, quite a few available in my local store
This includes the bundle with the guitar, not the solus edition
Guitar Hero World Tour Guitar Bundle includes:
Wireless (includes batteries), touch sensitive slide bar, Increased accuracy with more responsive dual-color fret buttons, Jam effortlessly with an elongated strum bar, Improved battery life with built-in auto sleep mode
Guitar Hero World Tour game
Innovative Music Studio - Compose, record, edit and release your own music.
Battle of the Bands Mode - Rock out in solo career mode or battle against other four person bands online.
Create-a-Rocker - Customize your own rocker or choose from several in-game music artists.
The Rock and Roll Experience - Biggest Selection of on-disc music with 85 master tracks!