It seems the iPhone 3GS is hitting a rough patch within its first month reminiscent of what the 3G went through last year.

Instead of the earlier model's 3G network problems, though, some iPhone 3GS users are finding the phone too hot to handle -- and hard to find in stores.

On the plus side, Apple (NASDAQ: AAPL) has released a new software development kit (SDK) for the OS version 3.1, a quick update considering 3.0 only hit two weeks ago. The 3.1 update will include a number of tweaks and previously missing features.

Reports of the iPhone 3GS overheating first surfaced on a French blog, echoed soon after throughout the blogosphere.

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