I wrote awhile back how I tried Peapod through Stop & Shop. It was a pretty good experience - between tip and the delivery fee, I'm not so sure I would do it every single time I needed groceries. Definitely good if I'm in a pickle.
Do you want to try Peapod? Save $15 on your first order by entering code SSVP15A. This code is good through 11/30/09. Delivery prices are $9.95 for orders under $100. $6.95 for orders over $100. This might come in handy during the Thanksgiving holidays. Crowds at grocery stores are unbelievable!