I wonder if people do pay attention to simple things like writing "Copyright" or "©". I mean, grammatically it does mean the same, why then use both in the folio (footer) of your website? Its either or and not both.
Examples:
http://www.isofthealth.com/
http://www.ppai.org/default
http://www.ppa.co.uk/ (this one's wasn't expected)
http://in.yahoo.com/?p=us (this too?)