Periodically, there will be something in the press indicating that BMW and Tesla have been talking, but to date, nothing has been agreed upon. It would require the addition of new control logic and cords to be available to work on any of the vehicles now coming out with the J1772 DC charge protocol built in like the I-series and a few others. The holdouts on that are the Japanese, since their system came out earlier...they don't' want to change.
BMW has said that the DC charge function will be standard on the 2015 model year vehicles. No idea what that may do, if anything, to the list price as the exchange rates keep fluctuating.