pagerank and serps (Score 1)

My pagerank has declined but my traffic has doubled from Google. Does pagerank really matter? I find that writing relevant content for my users works. Has anybody challenged Googles patent and will it stand up to challenge. Surely if Pagerank really worked it would be completely commercialised by now and you could buy links from high rank pages. Google will decline if it doesent get rid of crap results. At the moment though with their reliance on Adsense it might not be in their interest to penalise the 'AskJeeves' type adserver sites. Maybe its time to publish a blacklist of sites that people can download to their browser that would work with Googles API to just not show these sites in the SERPs http://www.node-net.com/