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You didn't state your order/confirm dates but the VIN usually arrives by email shortly (within hours) after order is confirmed and locked down. If you missed the VIN email, then check your MyTesla landing page where it will be posted upon issuance.
You can log your order and track the experiences of others in the tracker embeded in the very first post of this thread. Model S Delivery Update
Its also a good thread to follow for the many questions and anxiety attacks you'll have during the build to delivery process. Hold on for the ride and congrats!