I'm not sure exactly what you mean by "make use of." If somebody here used the application to build a really fascinating Blazers blog with lots of great content? Sure, I'd use it. I'd look at such a blog several times a week. Probably even comment.
Would I build such a blog myself? Nope. Even if I wanted to make a blog, I'd probably go with Wordpress and just build my own independent site. I really like this forum, but if I were to put that much work into a blog, I'd try to make a few bucks off of it using Google Adsense. I wouldn't be looking to get rich, but I'd figure that I might as well pay for my weekly Starbucks.
I think that may be the biggest problem with blogs linked to forums. People who are really serious (and good) at blogging want to run their own show, make their own money off advertising, have control of the domain and the traffic. Less serious people will generally put up forum blogs and flake on them after the novelty wears thin.
I could be wrong, though. All it would take is one really great writer to use your blogging application and it'd be well worth it to you for the traffic they'd drive in.