Default Idea Case with otg built-in

For me at least it would be a go idea if some OEM made a case like the battery extender cases you slide your phone into and you would have the ports like the OTG adapters they sell.
i.e. full size USB port, card readers at minimum. Plus a port to charge/sync the phone in case you leave the case on.

Only and idea/wish.

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Device: Samsung Galaxy S II
Network: T-Mobile
ROM: [Unofficial]CyanogenMod 9 Nightly Build 5
Storage Card: 32Gb MicroSDHC

Device: LG Mytouch Q
Network: T-Mobile
ROM: No roms or recovery yet =(
Storage Card: 32GB MicroSD