Ideas are cheap. Everyone has some. To get your idea patentable you have to get it into some useful form.
I cut and pasted the response below from the last thread that asked this question:
You cannot copyright ideas... implementation is what counts. If you feel your site is fundamentally different than the other sites out there today, launch a limited beta (to prove implementation) and find a mentor with corporate experience.
It is worth looking at the social media frameworks suggested in the previous posts, but if a pre-existing framework can do what you want without a lot of modification your idea is probably not different enough to warrant a patent.
Understand that if you bring in someone else to develop the idea for you, that person will eventually wind up owning the majority of the rights to your project. It is all about who can make it work, not who thought of it first... Otherwise I would hold a patent for a perpetual motion machine.
Remember also that patents must be defended to remain valid. If someone does copy your site, you need to have the financial footing to go after them.
My advice is this: if your idea is so amazing and wonderful and you think it would benefit others don't worry about patents and copyrights and instead focus on making something people will use. "Open source" your idea. If it is successful, alternative opportunities to make money from it will present themselves...