Would you be interested in downloading raw tracks created by Tommy Lee, use these tracks record your own ideas and then upload your contributions for a chance to have your work appear on his album? He calls it the project the Public Record and it sounds like a really interesting idea.
Garageband) Tommy even provides a link to RiffWorks T4 for you to download... for free.
I am only sorry that I did not discover this project earlier as six of the eleven tracks have already been released (although they are re-opening these tracks for a few days each, for further contributions - but this time with some direction about what they think they still need).
He claims it is the first time that this has been done with a whole album, on such a massive scale, for a recording that is intended for commercial release and. In addition, some of the contributors will be invited to play live with Tommy in Los Angeles when the album is released.
It's difficult to judge whether it is magnificent or mental but I hope he pulls it off.