Can I add something to your excellent list? Expect questions from readers and make sure you have a dedicated, knowledgeable person per ’subject’ at hand to answer the readers question a.s.a.p.
That doesn’t even has to be one of the ‘regular’ company bloggers – extra advantage: everyone gets involved and it becomes e real team-blog

Karin H. (Keep It Simple Sweetheart, specially in business)