I would like to use this domain for profit. Did I just waste $8 buying it?
I have fared pretty well registering domain names that are very similar to trademarked names and such. If your work seems to encourage interest in the topic and doesn't take anything away from the real product, then they ought to let you keep up your work. You are helping each other out.
If, on the other hand, they want you to stop, you usually seem to get one chance to sell out to them ("settle out of court" as it is). With someone like FOX, you would be prudent to settle.
Good luck with your venture!
PS - I am not a lawyer; this is not legal advice; your milage may vary; offer not valid in California; checks will not be honored.
I too, am not a lawyer but I think they would be hard pressed to take the domain away from you then... at least you could try and make some money from advertising your site and getting users to pay for certain services relating to that TV program... a T-Shirt store or whatever!
Good luck and welcome to WebmasterWorld,
Sticky