Common Dreams posted a story last week, "Food Banks Ask Gardeners to Grow Extra for Hungry", that is a good reminder of how we can use our gardens to help the community. You can donate produce to your local food bank. I don't know about you, but we always have more than we know what to do with, and it's a joy to share fresh, organic vegetables.
In Ann Arbor, we have Food Gatherers, a local non-profit that always welcomes donations of produce from your garden. Check our their donation page for details on how. We frequently have Project Grow volunteers who are willing to collect produce from one of the community gardens on a regular basis to make it easier to contribute. Watch for emails about that during the growing season.