I've gone to a couple WP7 training courses and whenever the developers ask about having access to parts of the OS and things of that nature, the microsoft rep mentions theres a OEM SDK. That SDK is unavailble to normal developers and only available to OEMs. If any very resourceful xda members got ahold of that SDK and leaked it, we would see some very interesting apps! It would be a great start to a jailbroken/rooted app store or something of that nature. Just offer all the great apps that wouldn't normally get approved by MSFT. ie wifi tethering, emulators....