Diversity Visa results will be available after May 1, 2012

DV 2013 Program: Beginning on May 1, 2012, all entrants may check the status of their entry.
Entrant Status Check will be the ONLY means of informing you if your entry was selected or not. All entrants, including those NOT selected, may check the status of their entries through the Entrant Status Check on the E-DV website www.dvlottery.state.gov. Entrants will need to use the information from their confirmation pages saved at the time of entry.


IMPORTANT NOTICE: If you have lost your confirmation information, you will not be able to check your DV entry status. We will not be able to resend the confirmation page information to you.
Source: http://travel.state.gov/visa/immigrants/types/types_1322.html#status