I have just uploaded a portlet which mimics the behavior of a news feed reader, although in a portlet. The portlet uses some of the new features from the portlet 2.0 specification viz Resource Serving. The source of the portlet is available in the project's SVN repository on the Project Bevy Site.
For a little more detail on what the portlet is capable of doing, visit my blog entry on sun about the portlet.
The portlet is AJAX enabled and for achieving this I have used the Adobe Spry Framework. I must say I am quite impressed with the Spry framework and found it extremely easy to use. Do give it a try!To use this portlet you will require a JSR-286 compliant portlet container. Read the blog entry mentioned above for more details on where to get such a container.
If you do give this portlet a try, please post your opinions on this blog or my official blog