I work closely with web development firms to implement SEO into their designs. Listed below are web development and design firms in the San Francisco Bay Area who specialize in developing websites for small businesses:
Almost Everything Communications
Karen Nierlich
Albany, CA
Jivaldi
James Ivaldi
Pleasanton, CA
Sierra Image Works
Natalya Brandt
Castro Valley, CA
As you may know, WordPress is a very popular tool for creating websites (and blogs). It can be set up by your web development consultant, and then you, the owner of the website, can make updates to all of the content (text, images, video, etc.) The firms noted above are experts with WordPress. Here is a web page with good information how to use WordPress:
http://freewptraining.com/learn-wordpress-with-free-easy-step-by-step-training