Zune HD "jailbroken"

While obviously not the first hack of any sort for the devices, this is described as the "first true hack," and it has made the concurrently-released OpenZDK possible. That effectively gives developers "access to everything XNA withheld before," which more or less opens to doors to any type of application that can run on the Zune hardware -- games, emulators, app stores, you name it.

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