The United States Citizenship and Immigration Services
http://uscis.gov/

Case Status for United States Citizenship and Immigration Services
https://egov.immigration.gov/cris/jsps/caseStat.jsp

United States Department of State Bureau of Consular Affairs
http://travel.state.gov/

Alinsug Law Office:
http://www.alinsuglaw.com/

The Professional Organization for Immigration Lawyers
http://www.aila.org/

The American Civil Liberties Union
http://www.aclu.com/

The Immigration Portal
http://www.ilw.com/