it's always hard to prove you had an idea first, but if you're really concerned you can register it with the writers guild (it's only like ten or fifteen bucks to register something) or take the poor mans route and write down your idea, seal it in an envelope and mail it to yourself. That way it's proof you came up with the idea with a governments post date. It's not as reliable as registering with the guild, but it's a viable copyright none the less.
Hulalaoo
men, internet is the best for of steel, how i can have more of 30 gb of music and no spend nothing money ?