Mass Effect 2 : DLC

http://social.bioware.com/forum/1/topic/106/index/890183

On the left side of the website, hover over "Profile" it should open a drop down menu with a point saying "Your registered game promotions"

Click on that, it should take you to the the download area.I activated the code in game and could download Zaeed and the Normandy Crash Site without any problems.

I did the same thing and whenever I click on the downloadeable content button in the ME2 loader it gets me to a window where it wants me to redeem my Cerberus Code again, which obviously doesn't work since I've already done it. Just seems to be a slight miscommunication between the game and the website as to where it directs you