I see your point -- you want to use the blog posts to stimulate discussion on the boards. Good point.
You can simply cross-post the excerpt form the original blog post, and disable comments for that blog post. Possibly adding a link to the end of the blog post directing commenters to the forum thread. I can include a checkbox when cross-posting "allow comments only in forum thread".
I don't want to sync comments between the forum and the blog, however -- I think that would be duplication of information, and a bit pointless, as well as raising lots of issues around security, spam, etc.
(My personal opinion -- and the reason for my above post -- is more that a blog is a blog, and a forum a forum, each with their own strengths and weaknesses.... Hence the need for an integration
. I see how occasional blog entries posted on the forum for discussion is a good idea... but (personally) am not a huge fan of blog mods where every blog post is cross-posted....