Interestingly, picasaweb.google.com contributes a whopping 73% of links to google.com<p><a href="http://pagerankgraph.com/#google.com" rel="nofollow">http://pagerankgraph.com/#google.com</a>
It includes nofollow links, another problem is that it gives a link in a massive series of links the same weight as others, when Google definitely doesn't. For instance, there is a blog with us in their blogroll hundreds of time, in reality it doesn't do much, they weight it as 90% plus of our juice.<p>Still definitely cool though.
<a href="http://pagerankgraph.com/#www.recojeans.com" rel="nofollow">http://pagerankgraph.com/#www.recojeans.com</a><p>Interesting, certainly not the sites I expected (the place I tested thoroughly and know I get most of my juice from isn't there, but that's all based on anchor text.)