What is GIS? GIS is a collection of computer hardware, software, and geographic data for capturing, managing, analyzing, and displaying all forms of geographically referenced information. Every year during Geography Awareness Week there is a GIS Day...this year it is November 15. Click on the link GIS Day to find out more about it.
Geography Network http://www.geographynetwork.com/
Rice University http://www.rice.edu/fondren/gdc/index.html
Stanford University http://library.stanford.edu/depts/gis/web.html
ESRI 2000 TIGER http://arcdata.esri.com/data/tiger2000/tiger_download.cfm
GIS Day http://www.gisday.com/