I came accross this site and think its Excellent :)
Have a look.......... http://www.mysupermarket.co.uk
mySupermarket is designed to help you spend more wisely at your supermarket.
Choose a supermarket, and see its products on 'shopper-friendly' shelves.
When you've filled up your trolley, we uncover savings you missed in your chosen supermarket, or let you seamlessly switch to another