Wonk alert - 2011 ACS data dump schedule
The 1-year 2011 ACS data will be available on September 20, 2012. This will be the first 2011 data released by the Census folks and like other 1-year ACS estimates will be for the largest geographies, i.e. those with populations of 65,000 or more.
Tentatively the next 3-year (2009-2011) ACS estimates will come October 25. This will cover areas with populations of 20,000 or more. Also tentatively expect the next 5-year (2007-2011) ACS estimates to come out December 6. That will be for all areas covered by the ACS including data for individual Census Tracts and Block Groups.