Nathan Erlbaum of NY State DOT has provided some links that may help you when the first
small area data are released from the ACS (2005-2009).
Note: the smallest geographic unit will be census tract (2000 geography). Block Group
data will be released later in Summary File format.
From: Erlbaum, Nathan (DOT) [mailto:firstname.lastname@example.org]
Sent: Tuesday, December 07, 2010 5:01 AM
Subject: FW: ACS 2005-09 comparisons with 2000 SF3
FYI. This may help next week when the 5-year ACS data are released.
It appears that the Census Bureau has updated its guidelines for comparing the 5-year
2005-09 ACS data to 2000 data. When I checked this link today
), I noticed that it
included the 5-year data, which had been missing when I last checked just a week or so
Also, the Bureau provides a variable-specific drill-down tool here: