BuddyPress.org

they provide you with an RSS feed for your posts and comments on any syndicated content (my feed)… just like wordpress ~ so if you want to pull a feed, just use any common feed parsing plugin to pull your RSS into your Buddypress install. I like to use feedwordpress. Or if you don’t want to duplicate the feed as posts, you can use the built in SimplePie functions in wordpress to display your RSS feed as a widget, like the widget here that pulls in rss from another site.