Ask HN: Should Microsoft be broken up?

We used to ask this question 10 years ago with the government in mind; today, looking at articles such as the one in the NY Times today (http://www.nytimes.com/2009/10/18/business/18msft.html) it seems like a question worth asking from the standpoint of shareholders, Windows/Office users, etc. Would love to hear the HN community's perspectives on pros and cons, and what a division would look like.