Sgt_Kickaxe - 8:50 pm on Jun 23, 2010 (gmt 0)
Do you have authority content on the index page for this keyword including history, images, videos, links to other authority sites on the subject, etc? Are other aspects of the keyword discussed in many places within the site? These would be the signs of an authority site on the keyword, without them nothing SHOULD work.
I've seen relatively incoming link free sites rank #1-3 for keywords before based solely on merit. Google would prefer to give a site the thumbs up than to penalize another site who passes established sites in the rankings. In fact passing such a site may trigger a review making the things I mentioned above even more important.