1Up did an interview with two of the developers for Guitar Hero: World Tour about the process of creating the game. One of the interesting things they mention is that they won't be putting up with people who use the song creation tools to make covers of existing songs. "We'll be actively monitoring the site. And, obviously, if the copyright holder complains, Activision will pull it down immediately. We can't condone people putting up covers of music. It's really there for original content." We discussed the creation tools themselves recently. Since then, Activision has announced that they'll be including a MIDI sequencer to assist with making your own tunes.