As the screen grab shows my feed reader can somehow see into the future!
The other day I was just going through my news reader when I noticed the feed for Science Daily showed the time/date as "in the future." Now if it will just do this with something like sports scores or the stock market then it will really be useful!
By the way, I use Netvibes for reading RSS feeds. It does all sorts of great things like play podcasts right in the browser. There are also plaenty of widgets that work with it. I highly recommend Netvibes. It's not an application, it's all done on the web through the browser.