I'm not sure when it started happening, but both Google and Live now display a simple "table of contents" (link) for the first entry (Yahoo doesn't currently, and Ask has its own variant)....
Its really quite handy.
Back when, I had proposed a similar feature for AOL Explorer, based on the idea that an auto-discoverable RSS feed (a simple feature all browsers now have) is more than just an "update feed" - its really also an alternative editorially managed table of contents for the site. The idea was that you'd visit the site (like ESPN or CNN), and perhaps a small toaster would appear in the lower right presenting the feed as a mini TOC for quick navigation.
In any case, no idea if that's how the search guys are doing it - but the idea that the RSS feeds are actively programmed means they present an alternative, intelligent view into the site clearly must feed relevancy (which is really another word for "recommended" if you think about it...).
And little features like this showing are going to be increasingly important - more content means more specialization (witness: search engine fatigue)- so nicely done.