The company today announced that it had sold one million iPhone 3G S units over the weekend -- topping early estimates by industry observers. But the company is also doing damage control by issuing credits to customers experiencing activation delays.

"Apple today announced that it has sold over one million iPhone 3GS models through Sunday, June 21, the third day after its launch," Apple said in a statement today. "In addition, six million customers have downloaded the new iPhone 3.0 software in the first five days since its release."

But problems began immediately for some after the new iPhone went on sale Friday, with bloggers reporting that Apple (NASDAQ: AAPL) servers couldn't handle the volume of traffic, which resulted in delays for customers wanting to activate their new phones.

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