Ding, ding!!! Gopunk wins the prize!
Anything original that you create is automatically copyrighted. Protecting the copyright is where the problems start. Putting a copyright statement on it is a good start. The hard part though is establishing that you actually copyrighted it when you said you did. Having customers (witnesses) helps. A low-rent way is to print out a copy, mail it to yourself, and don't open the envelope. It will have a postmark with the date on it to establish when it was sent. Or you can register the copyright material with the Library of Congress copyright office.
BTW, trademark protection differs from copyright and is something you sould also look into for your site name and logo.
And since I have to, I'll point out that I am not a lawyer and that you should consult an intellectual property attorney for "real" information.