Links to the best stuff
Community Toolbox ~ a vast resource
Ashoka ~ social entrepreneurs
Green Media Toolshed ~ great media training
The Control Game ~ spot fake involvement
Shelterforce ~ community dev articles
ZNet ~ articles on social change
National Civic League ~ citizen involvement
Civic Practices Network ~ lots of material
Community Development Discussion Listserve
Citizen Toolbox ~ 60 tools from Australia
Benton Foundation ~ media action
Rural Community Toolbox
Links for Building Democracy & Community
Creating Web Action Alerts
Training for Change
All Sorts of Other Activities

The preceding list of community building activities only hints at the possibilities for community building at the local level. Other possibilities are limited only by your imagination. They might include joining or creating:

Community Building Activities / Part 2-18
The Citizen's Handbook / Charles Dobson /