Immigration 

• About: U.S. Immigration Issues
  Links to article and sites about immigration, from About.com.
• American Family Immigration History Center
  Research passenger records from the ships that brought immigrants to Ellis Island between 1892 and 1924.
• American Renaissance: Guide for the Mexican Migrant
  "The purpose of this guide is to provide you with practical advice that may prove useful to you in case you have made the difficult decision to search for employment opportunities outside of your country."
• America's Immigration Quandry
  A Pew Research Center report investigating the issue.
• Border Overview
  Information on Borders and Law Enforcement from the U.S. Embassy in Mexico.
• Center for Immigration Studies
  "The Center for Immigration Studies is an independent, non-partisan, non-profit ... think tank devoted exclusively to research and policy analysis of the economic, social, demographic, fiscal, and other impacts of immigration on the United States."
• Ellis Island
  History of Ellis Island, passengers, geneology resources, timelines, etc.
• FAIR: Federation for American Immigration Reform
  "A national, nonprofit, public-interest, membership organization of concerned citizens ... FAIR seeks to improve border security, to stop illegal immigration, and to promote immigration levels consistent with the national interest."
• The Immigration Debate
  News and articles on immigration and proposed reform, from NPR.
• The Immigration Debate Links
  Links and lessons following the history of immigration in the U.S., from the Constitutional Rights Foundation. They also have a downloadable .pdf on the Current Issues of Immigration, 2006.
• Immigration, nationality, and citizenship law
  Links to resources on the immigration laws of various countries, including the U.S., from the Internet Law Library.
• Immigration Newspaper Archive
  Scanned .pdf copies of newspaper articles about immigration and immigrants as far back as 1845.
• Los Angeles County Office of Education: Immigration Reform
  Offers a .pdf booklet for schools about issues relating to immigration reform.
• The New Americans
  "Follow a diverse group of immigrants and refugees as they leave their home and families behind and learn what it means to be new Americans in the 21st century." From PBS.
• Office of Immigration Statistics
  From the Department of Homeland Security.
• Public Agenda Issue Guide: Immigration
  Facts, discussion guides, public opinion, policy options, and further resources.
• Travel.State.Gov
  Information not only for U.S. citizens travelling abroad, but for foreigners travelling to the U.S. Includes information on various types of visas and on permanent immigration.
• Truth in Immigration
  "Truth in Immigration’s mission is to rebut legal and factual inaccuracies about immigrants and/or Latinos. ... [and] to serve as a watchdog for communications about immigrants and to research, collect, and rebut legal and factual inaccuracies about immigrants...."
• U.S. Citizenship and Immigration Services
  Materials on immigration, guides for new immigrants, forms, rules, laws, and other information.
• U.S. Customs and Border Protection
  News, infomation, fact sheets, photo gallery, videos, and more. Includes handy fact sheet on Border Wait Times for entering the U.S. via Canada or Mexico.
• U.S. Immigration and Customs Enforcement
  A government agency for "identifying criminal activities and eliminating vulnerabilities that pose a threat to our nation’s borders, as well as enforcing economic, transportation and infrastructure security."