The iPhone may provide as much as $200 million in extra revenue for Apple on launch day, according to TheStreet.com. Using estimates of 200 units per store and an average selling price of $550 — it is still unknown whether there will be equal amounts of 4GB and 8GB available — along with the hard number of 1,962 stores carrying the device, a sell-out of 392,000 units would generate $216 million in revenue for Apple on June 29, not including…