I’d like it so that if I do not specify a product SKU, then Magento auto-generates one. Or takes some variation of the primary ID. Looks like others want this feature too:
http://www.magentocommerce.com/boards/viewthread/5537/
If you’re using Configurable Products, it does this already - you set the SKU for the Configurable Product and it auto-generates the SKUs for all the simple products associated with it. Not sure if that helps you at all.