Apple just released iOS 6.0.2. The software update is now available in iTunes. According to Apple, the update includes "improvements and bug fixes", including a fix for a bug that "could impact Wi-Fi". At the moment of writing this, iOS 6.0.2 is only showing up in iTunes, as Apple's own software update tool for iOS is returning an error.
iOS 6.0.2 is available only for the iPhone 5 and iPad mini.