You may also find it helpful, especially if the 12 communities you want to identify are all U.S. communities, to use data from the U.S. Census Bureau's American Community Survey. For example, to access a table of percentage of foreign-born residents by metro area (or county) by state, follow these steps:

1. Go to the American FactFinder main page.

2. Under "American Community Survey," click on "get data."

3. Select the 2005 American Community Survey (a lot of the ACS 2006 data won't be released until September 12, 2007, including the foreign-born stats that we're looking for now) and click on "Geographic Comparison Tables."

4. Leave "Nation" as the geographic type. Select one of the geographic break-downs from the other drop-down menu (use the glossary to help figure out what each geography means) and click on Next.

5. Scroll down in the next drop-down menu to "Percent of People Who Are Foreign Born" and click on Show Result.