Speaking on Deep Background, the Press Secretary whispered:
Question: We are looking for something that sits in the PDUs or branch
circuit-breaker distribution load centers, that, on a branch-circuit by
branch-circuit basis, can monitor amperage, and be queried by SNMP.
Considering there are several hundreds of circuits to be monitored, cheap
and featureless (all we need is amperage via SNMP) is fine.
You really want wattage. The power factor of switched supplies
is far from unity.
Take a look at <http://www.quadlogic.com/transmeter1.html>
Also, recall you sell each watt twice -- once to heat up
a chassis, and a 2nd time for the HVAC to cool it.