RegDCP - 10:47 pm on Sep 17, 2012 (gmt 0)

Can I just add that the semantic structure of a document is also dependent on the doctype. Sure in XHTML I would agree completely with Lucy on proposed structure but in HTML5 each part of the page ,ie, header, nav , content, aside and footer, can have its own H1-H6 and that would also be correct

Ya but this is a mark up nightmare, eh?
Since Google judges importance of copy based on text size, (And they tell us they do), having multiple h1 headings on one page would be a horror to auto semanticize.