ESRI Discussion
ESRI Discussion Forums � organized by product, most are open to everyone, a few other special topics have their own forum
comp.soft-sys.esri � newsgroup discussing any and all ESRI products
Independent ArcView Mailing List - unmoderated, from Bill Huber, content mirrored at Directions Magazine
ESRI Industry User Groups - many industries have email discussion groups
ArcView-L - ESRI hosted list, mirrored at Directions Magazine
comp.infosystems.gis � general GIS newsgroup
SpatialNews discussion list - general discussion list, content mirrored at Directions Magazine