Generosity ebbs and flows, but in the wake of Katrina it burst forth at levels not seen since the Asian tsunami. Americans opened their wallets and corporations their coffers, sending water, blankets, cookies and toilet paper. Many companies are offering grants to encourage giving. Time Warner, for example, will match up to $1 million in employee contributions to the American Red Cross.
Help can come in many forms. A few good souls have gone to craigslist.org to offer free space to refugees in their homes--from "a small 2 bdrm trailer" in West Virginia to "a double bed, plus a...