A search for "amateur wife" on Google:
http://www.google.com/search?q=amateur%20wife
shows 3.9million results and the 1st result is:
http://www.absexxx.com/amateur-fucki...teur-wife.html
The page has a PR4, yet when you look at the backward links, its only linked from the same domain:
http://www.google.com/search?q=link%...teur-wife.html
Other pages from this domain are also ranked in the first page for popular search queries like Nude Amateurs, Amateur Pictures, etc.
How did he do it? I thought you had to get your pages linked to alot for it to get such a high SERP position & PR.