Hey yinz -
We are trying out a new CSA this year after having been very happy with both Kretschmann's and Penn's Corner. It's a small farm about 50 miles away called Edible Earth Farm and they have a Highland Park/ Morningside dropoff. 
Supporting local farms is important, entrepreneurship should be supported, and eating vegetables is good for you, so think about it!
http://www.edibleearthfarm.com/2011-CSA.html
Christine Cato