Major Nelson reports that Ubisoft announced the Rainbow Six Black Map Pack that was released then taken down from the Marketplace was intended to be free for all users and will be tomorrow, 6/30. If you bought it, they will credit you back the points for it and on top of that the Red Pack will now be free as well (as of July 6th).
Personally, we think this is a great move and very fair to those of us that own the 360 version. Especially considering all the heated debate 2old2play saw when we last reported on this subject. Apparently UBI agrees that paying for this pack was not needed.