i like VM very much, and work for 8 year. I have propose. Look at this. every internet comerce site have identical products with identical names but have diferend fields/ like size/ pordut A size X, product pordut A size XXL, pordut A size XXXL.
I think it will be very cool if products like this (if they have one product_scu, maybe) displayed on the page like one product with combobox [field_name], and displayed on the admin tools like diferend products, its give chance control the product count in stock with diferend fields, and clean site from thousand identical products.
Thank you for atention.
I think you are interested in child products? If so they have been in VM for some years. http://docs.virtuemart.net/manual/general-concepts/186-derived-products-product-pattern-child-products.html