I have a new personal project in mind. The idea is to improve my Java skills by developing a desktop application to read and manage my personal RSS feeds.
Yes. There are several applications that do this, even in Java, just like RSSOwl that uses SWT for the widgets.
The application will have the same features as Akregator, obviously not all on the first release.
For example I will have a tree on the left with the subscribed feeds, expanding a feed will display each topic in the feed, clicking that topic will then display the contents for that topic in the JEditorPane, as html via XML/XSL conversion.
Alternatively, I will use an open source editor that has good xml support.