I hadn't until recently, but I think it is awesome. I'm still trying to decide which one to join. But I'm getting ahead of myself! CSA is short for Community Supported Agriculture, a program where people who appreciate fresh, locally-grown produce can buy a share in a local farm and thus a "share" of the produce.
How it works:
Brilliant! Find a CSA near you at http://www.localharvest.org/csa/