pbhj's Journal: seo

amazing stats on search engine use from a blackhat's stats from Overture
http://seoblackhat.com/2006/08/11/tool-clicks-by-rank-in-google-yahoo-msn/

http://www.silktide.com/sitescore-overview
http://www.silktide.com/sitescore/reseller

http://tools.davidnaylor.co.uk/

advertising / seo qualifications (as seen at davidnaylor.co.uk, http://www.davidnaylor.co.uk/pages/pay-per-click-management.html)
https://adwords.google.com/support/select/professionals/bin/answer.py?answer=12252&topic=182
http://advertising.microsoft.com/adExcellence/my-adExcellence

McAfee site analysis (dodgy links, malware, bad reports, etc.)
http://www.siteadvisor.com/analysis/