How to create a news section of a WPMU GridMarket or SimpleMarket site

I am using the GridMarket or SimpleMarket theme (have not decided which yet) for a site.

I would like to create a 'News' page for Blog entries but don't know how to display Blog posts on this page.

My posts table has posts of different types and at the moment my News page is displaying 'Product' posts from the WPMU Marketpress commerce plugin.

Ho can I create a Blog part of my site and get it to display just the 'regular' WP blog posts?