I had this on my CAG alert and just got an email notifying me it dropped.
It could be $5 in the Steam sale at the end of the month/early July.
I don't know if you can link this with your Steam account (I don't use Steam much). Someone with better knowledge on that can answer.
Deal is dead now.
Edited by icedrake523, 17 June 2011 - 06:36 PM.