Actually, you can do this now.
On the homepage is a section towards the bottom called
Recent Posts. It displays the 5 most recent posts (be they new posts or replies to existing posts).
If you click the

icon within that section, it will display a page listing all the posts on the site in order from newest to oldest.
You can can also subscribe to the RSS Feeds for the category(s) you are interested in. On the homepage, click the

icon next to the category you want to add to your RSS Reader (built-in both IE and Firefox).
Give it a try.

- UT Admin