The 3.1 version of the iPhone SDK is available now, bringing a couple new fixes like having the OS simulator "more closely matching the device." There are also new Interface Builder, XCode and Dashcode changes.
Palm's Mojo devkit has leaked to the web ahead of schedule—they had announced it would arrive in late summer, and instead developers are treated to the SDK right now.
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Palm just posted an update on their developer blog telling developers—all of whom are anxious to make apps for the Pre and start making money—that the SDK won't be out until late summer.
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