When I first started programming Windows applications back in the early 90's, I used to read all of the KB articles that Microsoft put out.  This kept me relatively well informed of some of the more advanced features in their products.  It also made me aware of their limitations.  Over time, there were too many articles and too little time to keep up with them, so I've since stopped trying. 

Now the KB articles can be retrieved using RSS!  If you go to http://www.kbalertz.com/allKbs.aspx drill into the category you're interested in and subscribe using the link on the XML icon. This is a great way to keep track of developments out of Microsoft.