This plugin on its own is great for creating lists of posts from a range of sources, using the RSS feeds from the sites you want to link to.
I've used it on my site for displaying the most recent posts I've written on other sites from around the web.
The Feed to Post add-on for WP RSS Aggregator though, takes this plugin to another realm of functionality allowing you to publish content on your blog from a range of sources of your choice on auto-pilot.
In a nutshell: a great plugin that is really easy to use.