Yahoo is rolling out new features that embed Facebook in the Yahoo user experience. Yahoo and Yahoo mail users will soon be able to see their Facebook news feed while logged in to Yahoo. Yahoo is also tweaking their "Profiles" social networking site, renaming it "Pulse" and featuring tabs for Facebook and other social media sites. So you can stay in Yahoo, they hope, and still get the experience of all those other sites (sounds a bit like AOL in 1995 to me but what do I know). You will also be able to post picturess on Yahoo-owned Flickr and see them pop up on Facebook. What's in it for Facebook? More sharing, more content, more inventory, more ad opportunities, more ubiquity. It's interesting to watch Yahoo lately as they roll in functionality from so many other sites.