I honestly do not like the idea of a Blog as part of a Forum. I also believe it is unneeded. Classic Castle, as an example, Has no blog, and it is a thriving community. Also, a blog requiress someone to update at a relativly constant basis, and a lot of people can't do that for a long time. As for the "getting more people" I doubt it will get very many more. The people will come. Patience is just needed. And constant vigliance.
Simply put, I think it is a silly idea.
The first theory of Ketchup: With enough Ketchup, everything tastes the same.