Peripheral maker Mad Catz has already released the Rock Band 3 Wireless Fender Mustang Pro-Guitar Controller, an option that features 102 buttons on the guitar neck and six string sensors. It lists for $149.99 USD.
Rock Band 3 competitor Power Gig: Rise of the SixString was released earlier this month with its own guitar/controller combo. Here's what we thought of that effort.
Rock Band 3
[Kotaku]