They've unveiled a new database, temporarily free, containing selected Voter Registration lists from 1900-1968.

Links to it are:

http://www.ancestry.com/search/db.aspx?dbid=1249 (members get regular person search screen)

http://content.ancestry.com/iexec/?htx=List&dbid=1249 (to search by county, then year)

I haven't found anyone there yet, but I'm sure I will eventually. Seems to have name, sex, address, occupation for each voter eligible to vote in various elections. Not all years in all counties, Los Angeles seems to have the most years covered.