I have, as of late, been spending a lot of my blog time on Robert Scoble's blog. Robert works for Microsoft as an Evangelist (what an interesting title!). I never thought that people at Microsoft would open up to the world this way. Maybe, that's a sad statement about my optimism about the world's largest software company. Anyways. Robert's blog and other blogs written by Microsoft employees really give you a sense of some of the people at Microsoft. And since these people create software that the vast majority of computer users work with daily, it's even more interesting to get to know who they are and have conversations with them through blog comment threads.
Special mention to the new video blog and forum site about Microsoft called Channel 9 started by Robert Scoble and a few of his friends within Microsoft.
And, also, learn about the evolution of Microsoft Word from Chris Pratley, who has helped developed Word for the past 9 years.