ResearchBuzz has a great research tool for genealogists posted on her site. I searched the site for some relatives and came up with some interesting information. You can also save the census pages to your own computer.
clipped from www.researchbuzz.org

Footnote Makes 1930 US Census Free Through End of August

Footnote.com announced yesterday that its 1930 US Census is going to be available free online through the end of August. The direct URL for the resource is http://go.footnote.com/1930census/.

You will have to register to have free access, but all the registration asks for is an e-mail address and a password.

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