As you are probably aware, Apple announced last week that iPhone 4 buyers would be entitled to a free case (or bumper) to correct the highly-publicized receptions issues with the device. Those who already purchased a case/bumper would be entitled to a refund.
The company has now begun the process of making good on that promise. MacRumors points to an Apple Store message saying, "As of today, we have automatically processed your refund. You have also been refunded for any Shipping or VAT charges which may have been applied to your order. If you paid via credit card, please allow 3-5 business days for the refund to reach your account."
In addition, Apple has released a downloadable iPhone app that lets users sign up for a free bumper or case. More info on this can be found here.
Meanwhile, some consumers are still waiting for a white version of the iPhone 4. Apple released the following statement today about it: "White models of Apple's new iPhone 4 have continued to be more challenging to manufacture than we originally expected, and as a result they will not be available until later this year. The availability of the more popular iPhone 4 black models is not affected."
On a somewhat related note, TheNextWeb points to a newspaper ad taken out by Samsung, which appears to include a subtle jab at the iPhone's antenna issues.