The blog settings and post forms include a few new fields. You can now set an image path for the blog int the Settings form. The image will be included in the blog's RSS feed and can optionally be displayed in the right column in the blog display. The settings form also includes a field for a Feedburner feed name. Configuring a feed name here allows you to select the Feedburner subscription form to be displayed in the right column of a blog display page.
The blog post form now includes a field for a category name. This will supplement tags as a way of describing and organizing blog posts.
These changes are described further in the Blog Manager help page.