The next version of MSN's experimental RSS reader is available at http://www.start.com/3. You have to solve the questions before getting access to the next version of the site but once that's done you get access to the juicy goodness.
This version of the site does a better job of letting you read posts inline. Another neat addition is the ability to drag and drop modules to arrange them on the page. Kudos to the the Steve Rider, Scott Isaacs and the rest of the folks who've worked on this.