2003: For years, hotmail was run completely on BSD. MS bought them with plans
to convert all mailservers to Exchange. They tried several times and failed several times. At this point (hearsay), it seems they have successfully migrated everything over to Exchange, but at the cost of 5 Exchange boxes for every BSD box they replaced. Their peripheral machines are still running BSD (nameservers for example).
http://www.greatcircle.com/lists/maj.../msg00039.html
2003: Microsoft runs linux? Up to a point...
http://news.netcraft.com/archives/20..._a_point_.html
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