I also am very interested in wegoshop.com.
I found this site a month ago and reading it sounds great. We also will be a party of 8 over Thanksgiving week and this sounds like a great way to do some shopping without going shopping. Their site did ask to have brand names, sizes and amounts available when placing the order.
I have asked our family to start getting the information ready ( making lists) for anything they feel will be needed during our trip.
I believe the cost was $10 for $100, 20 for $200, $30 to $300 then something like 17% of food bill + PLUS TIP. I may be off a little since I am doing this from memory.
I also believe this would be great during the stay to make a call and have them delivery to restock or add additional item. I wish I had found this during our earlier stays since we alway fly and almost never have a vehicle during our stay.