I'm creating a website where we will be selling admission to seminars and trainings. As such, these "admissions" don't get shipped, and are therefore not tangibles and we have no need for the item to go into a queue waiting for shipment. However, since we only have so many seats in these seminars and trainings, we'd like to be able to limit the number of these admissions that can be sold using inventory control. As it is currently implemented, there doesn't appear to be any inventory control on items other than tangibles. Is there an easy way to create a new product type that would have inventory control without the shipping workflow?