The lack of a microSD expansion slot on the 920 may not be the end of the world

I know its not that big a deal, but to include a microSD expansion on the 820 and not on the 920 gave me the 'i give up feeling'.

But then I thought, OK, MS has not told everything about WP8 yet, so maybe the micro USB slot can be used to hook up to a portable external card reader.

Does anyone think that can be done? With the same core as Windows 8, wouldn't WP8 have functionality to support this right out of the box?