QUESTION: Serious Investors for Open Source Ventures

Here's a question for serious investors (there are quite a few that read this blog).  

Picture this is an open venture.  It works on a share of revenue basis and will not relinquish any ownership interest.  The venture is owned (required due to legal rules) by the Founders of the venture with strict covenants on what they can do.  It also operates in a way that makes it much more likely to succeed (as in: hit a home run) with much less risk (outright failure) than traditional ventures.

However, as an open source venture it won't be doing an IPO or going to a traditional banking source for its financing needs.  It can, however, take in investment on a share of revenue basis.  

Would investors be interested in investing in a venture like this?  If so:

1. What percentage of the revenue would be required?  Assuming a a fixed amount of money raised against a fixed share of revenue (i.e. ten percent).
2. What payoff considerations -- number of years (i.e. five years) or a fixed multiple (i.e. 5x).  
3. What additional convents are needed?  

E-mail response to this is preferred.  See upper right for e-mail address.