GeoCommunity: Questions about GIS job postings, software tools, and utilities
Geomatics: Interactive GIS learning tool with detailed theory and examples.
GIS Frequently Asked Questions: The FAQ is a resource of the comp.infosystems.gis newsgroup which is connected to the GIS-L mailing list.
Guide to Distributing Your Data Products Via WMS 1.1.1: A tutorial for data providers by Rob Raskin, Ocean ESIP, Jet Propulsion Lab.
PPgis.net: Open forum on participatory use of geo-spatial information systems and technologies.
Stas Kovtchega's Page: Provides a document that describes a method of using GRIB data in ArcGIS 8.2.