I really like being able to glance in the list pane and eyeball the stories per day etc, kinda the way Reeder does it http://cl.ly/image/1h1W0X0J270P
Even better would be to have the day labels read “today”, “yesterday” if they actually match today and yesterday, but that would be icing on the cake.
Started really using Newsblur daily, really enjoying it, now. It works a lot like Feed Demon on Windows which I loved to bits, but had to give up when I moved to OS X.