It will allow me ~6 rigs the one strip and leave me up to 6 more rigs on 120v in time, though I'm more likely to just run another 240v line since this is a basement and the breaker box is only 20 feet away 
Yeah that is what I did in the garage. First one 30A @ 240V circuit and then a second.
Too bad nobody makes a 50A PDU.
Cause no way I am using all 12 plugs with "only" 5.7KW usable power.
http://www.plugloadsolutions.com/psu_reports/CISCO%20SYSTEMS,%20INC._N7K-AC-7.5KW-US_7500W_SO-196.3_Report.pdf
http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/ps9512/Data_Sheet_C78-437761_ps9402_Products_Data_Sheet.html
Quote
The 7.5-kW AC power supply module for the Cisco Nexus 7000 Series is a dual 30A AC input unit. The AC power cords for the 7500W power supply are hard wired directly to the power supply. When both inputs are connected, the output power is 7500W. If less power is required when just one input is connected, the power output is 3750W. Table 2 shows the power output provided by one 7.5-kW AC power supply module. Two versions of the 7.5-kW AC power supply are available: United States and Japan, and International.
EDIT: Just realized that that has 50VDC output, and are only 80Plus Silver
However, on a more serious note here is a 3KW unit: http://www.plugloadsolutions.com/psu_reports/COMPUWARE%20TECHNOLOGY_CPR-3027-1M1_3000W_SO-318_Report.pdfhttp://www.compuware.com.tw/english/products/power_supply/CPR-3027-1M1.asp
And they are PLATINUM rated! 94% efficient at 50% load, and more than 91% at 100% load. My 6x 5870 rigs can now become 6x 5970!
