I am a second yearassociate (and long time WSO reader) who was selected to launch the first officially-sanctioned BCG Twitter account. It will be 1/2 "A day in the life of a BCG associate" and 1/2 recruiting-related info such as events, interview tips, drop dates, etc. I will be tweeting several times a day.
Follow me @BCG_Associate
I just launched last week, so the following is still small but growing - I am really looking for WSO readers to come through for me on this one.
FYI, there is also @BCG_Consultant account that is similar to mine, but aimed at the post-MBA crowd.