Stack Exchange on Geographic Information Systems
gis.stackexchange.com (not live yet) could soon be the new Q&A site for anyone interested in GIS. The technology is based on Stack Overflow, meaning that users can rate answers to the questions so that the best one shows up first. If you would like to see this happen, support the proposal here: http://area51.stackexchange.com/proposals/1425/geographic-information-systems?referrer=gnmvpv_s0afgMMEpzVsZAg2.
Update: gis.stackexchange.com is now in Private Beta!