Many argue that WordPress, without any bells and whistles, is the ultimate SEO tool. My Internet Scout choose to use wordPress as the CMS of choice before Matt Cutts’ endorsement at WordCamp San Franicisco 2009.
Who is Matt Cutts? He has B.S. and M.S. degrees in mathematics and computer science, and while working on his Ph.D. he joined Google. He’s currently the head of Google’s Web Spam Team (which truly should be called Google’s ‘Anti-Web Spam Team’).