I'm late to the party here, but if anyone's looking for a last-min Delta companion cert expiring at the end of this month, November 30 2014, I've got one for sale. $125.
Note that there's a 14-day advance purchase requirement so you'd have to want to go somewhere between the 26-30th!
Fare codes L,U,T, buy one get a companion free. Travel must be completed by Nov 30.
Limited audience, but you never know.
Liz