graeme_p - 9:10 am on Dec 8, 2010 (gmt 0)

If natural links are no longer registered by Google because natural linkers tend to be cautious and use the threatening nofollow attribute

Assuming you belive that they are ignoring no follow links. There is a page on my site that has that ranks reasonably well, has the same toolbar PR as the home page, is not strongly linked to internally, and has no external links I know of apart from Wikipedia (which is no followed).