FeedDemon's "Popular Topics" feature is a great way to discover what people are talking about within the feeds you're subscribed to.
Just click the "Popular Topics" toolbutton 
above FeedDemon's integrated
browser, and FeedDemon will quickly scan your subscriptions to find the most popular links within them.
View a screenshot
Note that if you're not subscribed to many feeds, there may not be enough information in your subscriptions to determine which topics are the most popular. But you can still find out what people are talking about by subscribing to various "memetracker" feeds. Here are a few such feeds to get you started:
