An agent/producer friend of mine threw a short film idea at me when my partner and I were having dinner with him and his fiancee. He gave me only the bare bones and I then went off and wrote a script that he absolutely loved. He left the agency to become a full-time producer, did a very successful staged reading of my screenplay, and has been fund-raising toward producing it, but other projects (and life itself) keep getting in the way. Meanwhile, because we never did any kind of formal option agreement (and I was careful to copyright the script in my name and also register it with the WGA), I've been (with his full knowledge) entering it in short screenplay competitions, and it's been doing really well. I would sincerely like my friend to produce this movie, but how do I light a fire under him, and how ethical (and forgivable) would it be for me to just take it away from him at some point (we're good friends)?