Second Post Section – Sidebar

I was wondering if any one knows if it is possible to add a section to the sidebar that is essentially a secondary blog area (used mainly to list links to interesting items, etc). One example of what I am talking about is the Enjoying section on https://whatdoiknow.org/ . This section also has its own RSS feed and archives page. I am new to WP (I am using 1.5) so I may be asking something that is totally crazy, but it never hurts to ask.