digital resources

http://ocp.hul.harvard.edu/immigration/
"Immigration to the US, 1789-1930"

Harvard University Library Open Collections Program--many resources on Immigration, legislation, photographs etc. From the description: "Immigration to the US, 1789-1930" is a web-based collection of selected historical materials from Harvard's libraries, archives, and museums that documents voluntary immigration to the United States from the signing of the Constitution to the onset of the Great Depression. For Internet users worldwide, Immigration to the US provides unparalleled, free and open digital access to a significant selection of unique source materials—more than 410,000 pages, 100 individually cataloged maps, and 7,800 photographs."

http://www.digitalhistory.uh.edu/
University of Houston Digital History page--fantastic resources, esp. for those of you interested in teaching high school/college English and American literature, American Studies.
I especially like the "Digital Stories" collected here: http://www.digitalhistory.uh.edu/multimedia/digital_stories.cfm