Planet13 - 6:56 pm on Apr 27, 2012 (gmt 0)
The top site in my niche has over 430 "paid" directory links (they appear in SEO Directories whose sole purpose - as stated on the directory - is to boost page rank).
They are still ranking number one, with two pages listed (so, effectively, results one and two).
I sent in all those links to google last night.
Will see if that makes a difference or not.