Monthly Visa Bulletin of the DV Lottery.
Julu - August

DV 2008 Visa Bulletin for the month of July 2008, and advanced notification for the month of August.
Each month the DV visa bulletin is published in the internet for the benefit of the dv lottery winners.
Here is the dv visa bulletin for the month of July 2008 where the winners can find their case numbers.

DIVERSITY IMMIGRANT (DV) 
CATEGORY
For July, immigrant numbers in the DV category are available to qualified DV-2008 applicants chargeable to all regions/eligible countries as follows. When an allocation cut-off number is shown, visas are available only for applicants with DV regional lottery rank numbers BELOW the specified allocation cut-off number:

Entitlement to immigrant status in the DV category lasts only through the end of the fiscal (visa) year for which the applicant is selected in the lottery.  The year of entitlement for all applicants registered for the DV-2008 program ends as of September 30, 2008.  DV visas may not be issued to DV-2008 applicants after that date.  Similarly, spouses and children accompanying or following to join DV-2008 principals are only entitled to derivative DV status until September 30, 2008.  DV visa availability through the very end of FY-2008 cannot be taken for granted.  Numbers could be exhausted prior to September 30.

C.  ADVANCE NOTIFICATION OF THE DIVERSITY (DV) IMMIGRANT CATEGORY RANK CUT-OFFS WHICH WILL APPLY IN AUGUST

For August, immigrant numbers in the DV category are available to qualified DV-2008 applicants chargeable to all regions/eligible countries as follows. When an allocation cut-off number is shown, visas are available only for applicants with DV regional lottery rank numbers BELOW the specified allocation cut-off number:

Source: US State Department