IGN has the details and some new videos giving a bit of insight into Guitar Hero III and how the multiplayer aspect will work. First a quote which talks of some of the new features, then a couple of videos!

Broken String: When an opponent breaks one of your strings, that button on the guitar controller won’t work until you fix it. To do so you’ll have to rapidly tap that “string” until it is repaired.

Difficulty Up: This one won’t appear if both players have the difficulty set to expert. If you’re playing on hard or lower and this gets sent your way, then you’ll find yourself playing up a difficulty level for a brief period of time.

Amp Overload: This attack causes the scrolling fret board on screen to shake and blur, making it extremely difficult to read which notes are approaching.

Whammy Bar: If you get attacked with this bad boy, you’ll have to get your whammy bar moving and fast before you can play notes again.

Steal Power: This one is self-explanatory. Use it to steal an attack from your opponent before they can use it. If they don’t have one to steal and you activate this power, you’ll lose it.

Double Notes: Make your opponent double up on how many notes they have to play for a short period of time: Devastating in the midst of a crazy solo.

Lefty Flip: The attack to end all attacks. Putting lefty flip on your opponent forces them to either transcribe the music or actually flip their guitar over and play left handed. Used at the right moment, it can not be stopped.

I’m a huge fan of the Guitar Hero franchise and can’t wait to see how it’s handled on the Wii.