Yahoo continues to inject social networking into its services.

Starting later on Monday, Yahoo Mail users will be able to update their Facebook status from their Yahoo Mail in-box. Facebook users will be able to log into their accounts right from the Yahoo Mail home page and will also be able to click through to the Facebook profiles of friends when they receive e-mail from friends who have linked their two accounts.

More: http://news.cnet.com/8301-30684_3-20001389-265.html