Middlebury has two-week trial access to the iPoll Databank from the Roper Center at the University of Connecticut, one of the world’s leading archives of social science data, specializing in data from public opinion surveys. If we subscribe, it would include RoperExpress (with the ability to download the datasets to conduct bivariate and mulitivariate analysis) and Roper Explorer (online analysis of several hundred studies allowing cross-tabulations without specialized statistical software). The trial now includes the download and online analysis options (use the register link to create a free user id to use this feature). More details on coverage.
Roper provides educational material for using their tools and learning the basics about polling and analysis.