Re:Looks great! (Score 1)

99% of the population would have no idea where to set up a Subversion or Mercurial.

Then you can use a distributed versioning system. Git has the capability to manage patches through e-mail; I expect other systems can do the same (this includes Mercurial BTW). It still requires a fair bit of computer know-how to get it all going, but something like Bazaar or Mercurial ought to be fairly simple to use once it is all setup.

Where is not the problem. Computer knowledge is the bottleneck.