We too have been dutifully filling the in the Customer Since field when we set up new cards. Now that we want to use that data to analyse how many new customers we have set up and when, it is not av...
I've voted for it too - its a good thing to be able to see when you received customers so you can work out how fast your growing. This then also helps you identify whether you need to take on new staff members to maintain the growing list of clients.
I'm not sure why a field was created if it isn't used in any reporting. Please add it to a sales report soon.