http://github.com/mxcl/homebrew is my project. IMO anyone who is afraid of forking is actually just afraid of losing control. It's much easier now for people to do a better job than you. You have to work harder in order to keep your kudos. That guy who has submitted 20 patches a month since 2005 could in theory attract more attention than you and everyone would start using their fork.
I'm probably 50% right.