Wrong advice. Copyright date should use the date of the oldest material, not the newest.
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.
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.
