The folks behind Outlook Express Windows Mail Windows Live Mail Desktop (beta) are blogging up a storm. If you haven't already you should check out the http://spaces.msn.com/morethanmail and subscribe to their RSS feed.
There are already two good posts; Where did we come from? Where are we going? which talks about some of the RSS features they are adding to the next version of the client and Hey, "Blog it!" which talks about blogging from your email client which is a feature I've been working with Vlada on.
PS: Anyone else notice that Microsoft is will be shipping four different RSS readers this year? There's the Onfolio integration in Windows Live Toolbar, Internet Explorer 7, Outlook 2007 and now Windows Live Mail Desktop. At this rate I may have to stop working on RSS Bandit...yeah, right. ;)