Back in June, I asked this question: "My question to the listserv members is (assuming an AASHTO pooled fund for a CTPP-like product), would you want an ACS tabulation of 2005-2009 using the 2000 TAZ definitions, and then, one year later, an ACS tabulation of 2006-2010 using the "new" TAZ definitions, with the 2006-2010 weighted/controlled to 2010 decennial census population counts?" Summary: I received 7 replies to my query, and there was a tie. 3 people said they would like BOTH tabulation of 2005-2009 ACS with the 2000 TAZs, and tabulation of 2006-2010 ACS with new TAZs. 3 people said they would prefer to wait to use new 2010 TAZs for tabulating the first round of ACS. 1 person said that they thought having two different small area geographies for TAZs one year apart might result in disclosure avoidance problems. Thanks for helping me think about this problem. Elaine