We joined the Be Wise Ranch CSA a few months ago -- essentially, it is produce and fruit from a local organic farm which is then delivered to a central location in your neighborhood, and you go and pick it up on a weekly (or biweekly) basis. Each member gets a box with an assortment of seasonal veggies/fruit.
I originally signed up for a trial service (four weeks) because I wasn't sure if we would like the kinds of fruits and vegetables they would include (I had visions of ten heads of cabbage or rutabagas). But it turned out to be awesome -- we've gotten organic basil, dill, cilantro, eggplant, heirloom tomatoes, watermelon, zucchini, cucumbers, baby lettuce, carrots etc. Nothing weird or inedible, and definitely a wide assortment.
The only gripe I have is two-fold and has to do with technology: they don't accept orders for the service online or over the phone. You have to mail in a check (they don't take credit card), and wait about two weeks for it to begin. Secondly their website leaves something to be desired. I'm sure if they upped the ante in the PR/Marketing department, their business would skyrocket.
One other minor beef: you get a window of time (two hours) to pick up your produce on a certain day of the week. This wouldn't be a big problem except the delivery is routinely late. Sometimes we've had to go there three times (over the course of an hour) to see if the delivery has made it. But since it's in the neighborhood, it's not a big deal since it's just a short trip away.
All in all, it's a great way to try out new vegetables and support your local farmer.