The previously available SPECACT DLC has now been updated. Those who were unable to previously acquire the 4 new achievements will receive a title update the next time they load up Bad Company 2.
Those that had fulfilled those requirements for the achievements can unlock their achievements by loading up their multiplayer stats from the main menu.
SPECACT DLC is available for purchase in the European markets as single DLC purchases (160 MSP) or the entire bundle (480 MSP). Those players in North America the United States can download the DLC through the Dr. Pepper promotion that resumes July 1st.
The codes that were previously circulating the internet have been disabled, but shame on you for not enjoying 23 delicious flavors of Dr. Pepper for that code. You know you're just missing out on life when you do that.
UPDATE: The SPECACT DLC packages are now available for purchase for North American players. They run you 160 MSP for separate purchases (totaling 640 MSP for all four) or the bundled purchase at the reduce price of 480 MSP.