How do I promote a B2B blog? And in particular

(A) what are the best blog directory Web sites (top 10-20
Web sites) for listing a B2B blog?  And how do I go about
registering with each?

(B) what are the best Web sites (top 10-20 Web sites) for
learning how to search engine optimize a B2B blog, to get
more traffic from organic search results? I want to know
specifically what has to be done to a blog, different than a
traditional Web site, for achieving success in organic
search listings.