General
GIS.com
Geography Resources Geography related news, books and web resources

GIS Data Standards
FGDC Federal Geographic Data Committee with standards on metadata publishing

Map Projections
Map Projections Overview Great information about map projections
Illinois State PDF Graphics of Map Projections

United States Government
EROS Data Center Spatial Data Clearinghouse by USGS
USA Image Server by USDA NRCS Raster data
USGS Home Page United States Geological Survey
BLM Home Page Bureau of Land Management
Geospatial Data Gateway by USDA NRCS