Through the Blog Portlet, there is a unique functionality where Blog information can be split into different pages.
To achieve this functionality, start by going to the wrench in the portlet and scoping the portlet to the specific page. This would make the scoped portlet unique to that page.
These steps can also be applied to Message Boards - however please note that once the scoped to a page, it will act as a brand new portlet with none of the previous content that was on the message board prior to coping. However, if it were un-scoped, all the previous entries would return.