Exploring the Open Government Datasets

There is a growing list of datasets being posted on the Data.gov website, at the direction of the White House.

I haven't found many primary geology sets but there are sets for hydrology, hazards, geothermal, etc.

137 years of Popular Science now online for free

Popular Science is making all of their archives of articles for the last 137 years, available online.  The older stuff is the most fun.