You can display any feed content as your own post content in your WordPress site. Virtual Posts is the new plugin that can publish virtual posts from any feed and instead of creating post copies it creates it’s own “virtual” posts and shows the feed content as a post.

First install and activate Virtual Posts plugin. Upon activation visit your admin area Dashboard -> Settings->Virtual Posts and add your feeds. You can set maximum number of  items to show for each feed.

From the ‘General’ tab you can set minutes between cron jobs to fetch feeds. Default fetch interval time is 20 minutes.The plugin also provides you a widget for displaying virtual posts in your sidebar.