Microsoft Enviroment video datacenter server numbers and power consumption?

"15 datacenters hosting 148,357 servers sitting on 17,406 racks consuming 72,500KW of utility power as of the end of January 2008 (as indicated by the bar chart). If you’re a bit of a imperial measurement person, that’s 97,000 horsepower."

Link:
http://www.istartedsomething.com/...