Windows Store has 100 apps in the "All Stars" section, so I'm assuming the total number is greater than that (by how much I don't know). Also, registration is

Windows Store has 100 apps in the "All Stars" section, so I'm assuming the total number is greater than that (by how much I don't know). Also, registration is currently invite-only, so I would suspect there are many people like myself developing apps but are unable to submit them.