Both Google Reader and Ask.com's Bloglines have gone under some interface and usability updates, with some added features included.
The Google Blog announced the update last night, and posted screen captures at the Google Reader Blog. The new features include unread counts, mark all as read, folders, expanded view, subscription sharing options, and a new interface to support all these new features. It looks more Bloglines to me, and much more friendly to power RSS users.
Speaking of Bloglines, they have also released an update. Bloglines announced that they have no longer refresh the left pane when you click on a feed, instead they use a "fading yellow indicator" to speed things up. Also the feeds update automatically more frequently, instead of you having to refresh the page. Bloglines added DHL support for tracking DHL or Airborne packages. Finally, Bloglines recently enabled Skweeze for Mobile Bloglines that improves speed and readability of Mobile Bloglines.