I think Tesla learned their lesson with the MS and MX reservation numbers, and giving the power of the customer to call up and complain about getting their car "out of order". With the number of M3 orders, and the multiple levels of priority given, Tesla wants that to be a non-decodable black box (which I think is a great idea), so basically you'll get your invite to configure when they're ready to hand it to you. Nobody will really be able to figure it out. That doesn't mean there won't be hundreds of pages of speculation in the next two years trying to figure it out. It's already starting.
Just go get a cold beverage, sit back, and relax. You'll get it when you get it.