Mini Media Centre

I could do with some advice. I would love to see this thing actually be produced and I've been playing around with the idea of selling the design or licensing it. But I'm not sure where to begin. Maybe you can help?

1. How would you go about approaching a company?
2. Do companies often buy designs or do they prefer to have them design in-house?
3. What do you have to be aware of?
4. What can you expect?
5. Is there any specific companies you could imagine would be interested

Do you know how it works? Do you know anybody who might know? If you do, please drop me a comment.