I like the way you think, jenks.

In no particular order:

Consider joining your local CERT (http://www.citizencorps.gov/cert/), or at least getting trained (for free) if you don't want to join the local team. CERT can provide you with a pre-existing structure to provide assistance until the professional responders get to you, especially if you get some of your neighbors to join as well.

Get trained on first aid and trauma care, and build up your supplies to be able to treat more people.

You can never have too many garbage bags, particularly the large and heavy contractor bags. Too many uses to count. Same with duct tape.

Candles and small, giveaway flashlights. I maintain a stock of fake Photons ("fauxtons"), the ones I like are http://www.dealextreme.com/p/white-flashlight-keychain-22000mcd-10-pack-1100 (no affiliation).

Communications. We recently had a thread about maintaining community communications in the face of disaster.

Food, water, tarps, lumber, gas-powered tools, hand tools, paper plates, cups and plastic utensils -- all are expensive to buy and store in sufficient amounts to help more than a small subset of your neighbors. But if you have more than you need, you may be able to help some.