The Catholic community who sponsored his work responded this way:
Catholic Democrats is expressing surprise and shock that Republican vice presidential nominee Sarah Palin's acceptance speech tonight mocked her opponent's work in the 1980s for the Catholic Campaign for Human Development. She belittled Democratic presidential nominee Barack Obama's experience as a community organizer in Catholic parishes on the South Side of Chicago, work he undertook instead of pursuing a lucrative career on Wall Street. In her acceptance speech, Ms. Palin said, "I guess a small-town mayor is sort of like a community organizer, except that you have actual responsibilities." Community organizing is at the heart of Catholic Social Teaching to end poverty and promote social justice.
As for the South Side of Chicago - not many people felt safe walking with Barack there, much less living there. But no matter where you are from, check out PaulVA who has a list of Community Organizers that made your life better. Other community organizers are fighting back.