Edit Items in Cart

Is there a way to allow a customer to edit a product once it's been added to the cart (ie edit item) as opposed to having to go back and re-add with the correct options and delete the original item in the cart (ie, check box for remove and clicking update)?


For example - you're selling a guitar and you have options for a red, black or blue case.  Let's say the user added the item with the option set to "blue case" but at check out decides he'd rather have the red case. 

Thanks
Kevin

It is something that would need to be modded. I like the idea tho. Perhaps I will take a look