i dont think this combo goes good together, if there was a product or something called imovie then maybe you could have a discussion forum about it, but for now $10-15
After development, I would think it could be quiet decent.
example... IMDB.com what the heck is that? Internet Movie Database (what a stretch), quiet popular.
So iMovieForum.com could EASILY be the Internet Movie Forum and could be used to discuss movies OR discuss movies made specifically for use on the... Internet.
I wouldn't make a guess as to $$, but I would say it could defenitely have potential.
Undeveloped. Mid XX$, with traffic and registered members could be much more, will depend on number of posts and members as well as ad revenue if the sites will serve ads.