If you want to replace your mono-sound Guitar Hero III game with the proper stereo sound version, Activision is going to let you. Eventually. Soon. They promise!
Right now, you can go to their website (linked below) to fill out a form for the replacement disc. But there’s a catch, with emphasis mine:
Guitar Hero III Wii Replacement Disc Pre-Registration Website
Once the replacement discs are available, the replacement program will begin. We will send you a disc replacement package which will consist of exchange instructions, a replacement disc claim form, and a postage paid envelope for you to return your current copy of the Wii version of Guitar Hero III: Legends of Rock. Once you receive your package, please complete the claim form and return your original game as directed. Once we receive your game, we will mail you the free replacement disc.
There’s no guarantee yet as to how quickly they’ll turn around the replacement disc, but you won’t be able to play the game while the exchange is happening. You have to send in your game disc first. Then pray the USPS gets it to Activision. They hope Activision’s worker drones do their job properly and quickly, and then pray for the USPS again. Best case scenarion, that’s a full week without the game you paid for in your hands.
I think I’ll stick with my mono version. Who knows? By the time they get around to offering the corrected discs, maybe I’ll have played myself out of the game and will want the down time.