From Neogaf forums:
Guitar Hero 4 (PS3, 360, Wii, PS2)
- Create a song. Although these exclude vocals due to storage and possible copyright issues.
- You'll be able to name your song as well as creating album art. After you've done all that you can upload it to GH Tunes where anyone can download it.
- You'll be limited to 5 songs at first. But depending on the ratings you get you'll possibly be able to upload 10 or more.
- The song sharing mode will be in the Wii and PS2 versions also, but GI says it's unlikely that it'll be as robust as the PS3 and 360 versions.
- Drums, bass, vocals guitar
- Create a rocker
- Create a guitar and drums
- All songs will be master tracks
- They don't want to discuss specifics on track listing out of fear of being scooped by the competition. However they confirmed 4 bands: Van Halen, The Eagles, Linkin Park and Sublime.
- A new guitar designed by Red Octane that includes a new input mechanic that'll "impact the way you play GH in the future".
- GI saw see through notes while playing that Neversoft said was the new input mechanic and that they were trying to patent.: