Here are the rules for my Ongoing project, in terms of collaboration. Most of this text comes from an entry on my Notes page dated 6/21/10.

My current idea is to complete a song with whatever instrumentation I see fit - whether that's just guitar and voice or multiple instruments will depend entirely on the song - post it prior to my deadline, and then make the mp3 file downloadable for anyone who might want to modify as they see fit (I had originally intended to post the GarageBand files I'm using, but apparently, this isn't doable). Feel free to go nuts.  Of course, I'd want to hear the results.  If whoever contributes is willing to share the results with the rest of the world, so much the better.  Post the song everywhere and often! If you'd prefer to keep it between us, well, I suppose that's ok too.  

In terms of collaboration and potential income, bear in mind that I will own all of these songs.  I will own the Copyright and will use this Creative Commons in conjunction with each song and the project as a whole:
 
http://creativecommons.org/licenses/by-nc-sa/3.0/
 
Should something you do with my song somehow create some big financial windfall or the opportunity for one, we can discuss a suitable arrangement.  For example, if you should happen to change the lyrics and melody for one of my songs but keep the chord progression and/or the instrumental tracks (or vice versa), we can come to some sort of agreement if the chance for income arises.   But, if you just add some tracks - say a guitar, voice, violin, fiddle, mandolin, or banjo part - I will happily give you credit, but I will own the copyright for the song itself.   

Feel free to email me at todd@toddlorenz.com with any questions, thoughts, comments, or whatever.

Have fun!