©

What are the legalities of putting the © symbol on a website? Does the site actually have to be registered at a government office? As far as "whose" law goes, I'm talking about USA. If I say that my website is copyrighted, does that mean my website has to be on file somewhere? If somebody steals content from my site, does this protect me? What exactly does "all rights reserved" do for me?

Everything you write/publish is copyrighted automatically (with or with the little symbol).

(with or with the little symbol).
you mean with or without?

2 seconds to do a google search (first link):

http://www.copyright.gov/