Ok. I've answered my own question.
From the MS website: As of December 31, 2002 there were 10,701,385,302 shares of Microsoft common stock outstanding.
However, there was a 2 for 1 split since then, so there should be roughly twice that number now. So if there are 20 billion shares and balmer owns 200 million, that's 1/10 of 1%. Hardly a controlling interest. The fact that there was a split this year also means that he hasn't lost $63 billion in value. More like $32 billion.
FYI - Gates owns 11.6% of the outstanding shares - about $31 billion.
I did find this though, on MS's thrid quarter 10-Q submission to the SEC. Describing the various sectors of MS's business and how they view the world:
"Competition. The Company continues to experience intensive competition across all markets for its products and services. These competitive pressures may result in decreased sales volumes, price reductions, and/or increased operating costs such as marketing and sales incentives, resulting in lower revenues, gross margins and operating income."
Intense competition? In the field of Operating systems and Office productivity software?