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BlackBerry is indeed not part of the Qi consortium. BlackBerry have had several charging methods other than USB : charging pods with metal contact on selected phones (curve 8900, Style and Bold/Porsche series) and on the PlayBook (with the magnet charger).
The Z10 and the Q10 will not have any accessory made by BlackBerry to enable charging without the USB port.
It will be possible for any third party accessory maker to design a special battery door that will enable a contactless charging (think Duracell's Powermat), but I do not know if the NFC antenna will be available.
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