The templating features in News Articles make it possible to customize the layout into anything you can imagine.
A common request is for a slider/rotation panel that can be used to feature articles or testimonials and that will rotate every X seconds.
Thanks to DotNetNuke that uses jQuery by default, this is a fairly trivial task. However, you will need a jquery plugin called "innerFade" for this example, so copy the js file to somewhere in your portals directory:
For a testimonials section, I would use the latest articles module showing 10 items. I would then go in and customize the template as follows:
<!-- Header Template -->
<!-- Item Template -->
<!-- Footer Template -->
This will show a single item (from the 10) rotated ever 4 seconds.
With some CSS, you could potentially get it to display like this: