Just incase anybody is interested, Microsoft has a Comprehensive List of all the RSS feeds that they do for MSDN. I mean they even have an XML Feed about XML at the bottom of that list.
Microsoft has Instructions on building your own RSS reader in C#.
And if that wasn't enough for you then have a look at blogs.msdn.com which has a comprehensive list of all Microsoft employee's externally viewable blogs, and they all have RSS feeds, but no Bill Gates does not have one, yet.
I like the Microsoft guys blog's because even the Human Resource guy has a good Sence Of Humour (at least I hope he is joking).