GIS Information
This is not an exhaustive list of GIS WWW links and resources, but it should help get you started along the right paths…
 
General GIS Web Sites - news and information
http://www.gis.com - What is GIS?
http://www.gislinx.com - a categorized list of GIS web sites
http://www.giscafe.com - another good source of GIS news and information
http://www.geocomm.com - and another one

ESRI and ArcGIS product information and support

http://www.esri.com/software/arcgis/arcview/index.html - ESRI’s main ArcGIS (ArcView 8.x) page
http://support.esri.com - ESRI Online Support Center (for ArcGIS and other products)
http://arcscripts.esri.com - ESRI and user-submitted scripts for ArcView and other ESRI GIS software
http://www.esri.com/news/arcuser/index.html - ArcUser Magazine (free subscription!)
http://www.esri.com/news/arcnews/arcnews.html - ArcNews (free subscription!)
 
GIS Data
http://www.cast.uark.edu/local/hunt/ - Starting the Hunt: Guide to Mostly On-Line And Mostly Free U.S. Geospatial and Attribute Data
http://www.gisdatadepot.com - GIS data sets (some are free, some aren't) – (DEMs, DRGs, DLGs, etc.)
http://edc.usgs.gov/geodata/ - U.S. GeoData (from USGS EROS Data Center)
http://www.esri.com/data/online/index.html - ArcData online (for ESRI software)
http://www.geographynetwork.com/ - Another source of GIS data and information from ESRI
 
Publications
http://www.geoplace.com/gw/ - GEOWorld magazine
http://www.geospatial-online.com/geospatialsolutions/ - Geospatial Solutions magazine
http://www.gpsworld.com/gpsworld/ - GPS World magazine
http://www.esri.com/news/arcuser/index.html - ArcUser Magazine (free subscription!)
http://www.esri.com/news/arcnews/arcnews.html - ArcNews (free subscription!)
http://www.tandf.co.uk/journals/tf/13658816.html - International Journal of Geographical Information Science
http://www.directionsmag.com/ - Directions Magazine
http://www.gisvisionmag.com/ - GIS Vision magazine
 
GIS Jobs and Internships!
http://www.gjc.org/ - GIS Jobs Clearinghouse
http://www.gisjobs.com/ - more GIS jobs listings
http://gis.esri.com/jobs/jobs.cfm - ESRI jobs
http://www.geosearch.com/ - Professional recruitment services
http://gislounge.com/ll/internships.shtml - Internships in GIS
 
Colorado GIS links (in no particular order yet)
http://www.co.blm.gov/metadata/cothemes.htm  - Geospatial Data and Metadata On Line for BLM Colorado
http://www.dot.state.co.us/App_DTD_DataAccess/GeoData/index.cfm?fuseaction=GeoDataMain&MenuType=GeoData - Colorado Dept. of Transportation Geographic Data
http://agrc.its.state.ut.us/colorado.htm - Colorado Plateau Data Sharing Page
http://www.fs.fed.us/r2/sanjuan/other_links/gis_coverages/gis_coverages.htm - GIS Coverages from the San Juan National Forest
http://www.landuse.com/gisco/ - GISCO (Geographic Information Systems in Colorado)
http://www.gisintherockies.org/ - GIS in the Rockies Conference
http://www.landuse.com/ - Southwest Data Center
http://www.swuggis.org/ - ESRI Southwest Users Group (SWUG)
http://co.laplata.co.us/gis.html - La Plata County GIS Office
http://sar.lanl.gov/topo_maps/ - Four Corners area (mostly New Mexico and SW Colorado) GIS data
http://rgis.unm.edu/ - New Mexico Resource Geographic Information System Program (RGIS)
http://www.coloradohistory-oahp.org/programareas/gis/gis.htm - Colorado Cultural Resource GIS Program (from the Colorado Historical Society)
http://ndis.nrel.colostate.edu/ndis/ftp_html_site/ftp_lead.html - Colorado State University Natural Diversity Information Source FTP Server
http://www.cdphe.state.co.us/hs/gishom.asp - Colorado Department of Public Health and Environment
http://www.epa.gov/region08/gis/gisdata.html - EPA Region 8 - GIS & Spatial Data
http://cogccweb.state.co.us/gismain.asp - Colorado Oil & Gas Conservation Commission GIS site
http://www.dola.state.co.us/oem/cartography/datasset.htm - Colorado Office of Emergency Management – Cartography/GIS Section
http://www.fws.gov/data/statdata/codata.html - Colorado Spatial Data Sets (from the U.S. Fish & Wildlife Service)
http://www.mountainstudies.org/DataBank/GIS/default.htm - GIS Data Sets from the Mountain Studies Institute (Silverton/Durango, CO)