[overview of socially responsible investing, with recent developments involving Walgreen, Starbucks, Ford, Chiquita, Chevron, Pepsi Bottling Group, AT&T, Coca-Cola, Verizon, Xerox, ConEd (Con Edison), JPMorgan Chase; positive steps by Bank of America, Hershey, Barrick Gold, Coca-Cola, Marriott, HP]