Thanks for remembering our meeting.
I am most familiar with differences from one metropolitan region to another. Among the most multi-ethnic metropolitan regions in the country, the 20 that we selected for the global neighborhoods analysis, we find the same general trends. People are increasingly living in mixed neighborhoods (comparing 1980 to 2010). And typically the changes involved Hispanics and Asians moving into neighborhods that were predominantly white, and then African Americans are the last group to enter.
At the same time, very large shares of the Bfrican American and Hispanic population continue to live in neighborhoods that were abandoned by whites long ago. You can see these all-minority areas in almost every metro area.
If you're interested in looking at how trends differ from region to region, you can read the whole report on our webpage: webbpage: http://www.s4.brown.edu/us2010/Data/Report/globalfinal2.pdf.
Since your are an academic, you might also want to read the article that we published last year in a sociology jiournal. This is the citation:
Logan, John R. and Charles Zhang. 2010. “Global Neighborhoods: New Pathways to Diversity and Separation” American Journal of Sociology, 115: 1069-1109.