User blog comment:Roads/News - News! :D/@comment-4139585-20120814161417

I have checked Special:CreateBlogListingPage, and from what is says on the page, it appears that you cannot choose the categories that the blogs come from or the category that the listing page is in. It seems to give you a list of the biggest categories and force you to take blogs from these categories. Using add category simply adds a category to this list.

As for creation, it appears only admins can create these pages.