If anyone wants the Dr. Pepper Mass Effect 2 items, I found this topic over at the Bioware forums:
http://social.bioware.com/forum/1/topic/103/index/919782/1
The codes:
CBEEAAA41NWH
CBEEAAAE4L9N
CBEEAAAFQG9J
CBEEAAAE98ZV
Apparently these are re-usable (anyone can use them in other words)...