Google likes wordpress blogs, According to Matt Cutts, WordPress automatically solves a ton of the SEO issues online-marketers might have. The WordPress software, makes your site easily crawlable by search engines, takes care of nearly all of the of mechanics of SEO (80-90%) and is the first big step anyone can take towards creating a popular online business. He even gave advice on how to find what you should blog about.
check this post and Matt Video

