Which is the most SEO Friendly CMS and for which factor? Cast your vote as well as the reason for making it most SEO friendly
Just to extend on that, It has a lovely API, a great user/developer base. Lot's of people are there to help you with wordpress ( including me ) , I have done some plugins on WP and its just like writing PHP the API hardly gets into your way.
Wordpress is great in term of SEO because it has very good plug-ings and all things which help to make website SEO friendly.