What's a Blog?
I've long said there are no rules -- guidelines perhaps on what's worked for others, but certainly no rules, not for something so new as blogging.
I try to avoid any advice that includes the word "must."
and adds that many big companies, i.e. "the slow and the big," demand iron clad rules, whether for blogging, advertising, or anything else.
Copyblogger Clark, who started this discussion, says:
what ever happened to it depends?
although he does try to "try to stick to fundamentals of solid writing."
A blog is just a tool. Use it however you'd like. How should you use it? It Depends.