Does that apply to the individual document page, or to the whole site? That is, if I have one static page that's from 2008, and the rest of the pages are from 2009, can I only say (c) 2008 on the one page?
I ask because it always feels to me, when I see "(c) 2001" or something similar, that a site is rotting on the vine.
Why? The purpose of putting a date on copyrighted material is to help you know when the copyright will expire (althought it's not in your lifetime :-). If you have material that you created in 2008, but put a (c) 2009 on that page, technically you are trying to cheat and extend your copyright protection by a year.
I know, for web pages it doesn't make any sense, but you might as well know what the right thing to do (TRTTD) is.