That said, it would take exceptional circumstances for me to work on such a project. Programmer time has a high market value, and--personally--I'm still having a hard time not looking at your idea as asking programmers to work on your idea for free.
Project management that your discussing is a non-issue until the project grows considerably. I think for many programmers it would feel like you were just taking credit for their work, rather than providing a valued service. People become project leaders by contributing publicly recognized effort and talent to the project, and I just don't believe the efforts you are suggesting would be viewed as valuable.