As well as a very simple interface that makes it easier to search for and read articles, Vienna includes integration with several social and web services. It will be possible to quickly share any post that we read over Facebook or Twitter and to save it in Delicious, three of the most used social services of the moment.
The application is really light, despite allowing us to manage thousands of subscriptions, to work with tabs (that can be used just like those of Safari) o to allow the use of intelligent folders, that will fill with contents dynamically according to the filters that we configure. And of course, the RSS feeds can also be ordered by categories or folders.
Furthermore, if you already have a feed reader, but you want to change over to Vienna, it is possible to import the OPML file to automatically subscribe to the same sites.