Samsung has released a ROM update for the Blackjack (SGH-i607). It promises to improve roaming capabilities, especially internationally. Aside from this, it updates the user interface to reflect the new at&t branding.
A number of discussion forums suggest that the DST patch will need to be reinstalled after the ROM update.
Note: The ROM update will overwrite the current ROM image and to erase the partnership and all user data and programs on the Blackjack. Be sure to backup your data before doing the update.