I just got the Q&C vouchers today that I ordered from Hotwire on Wednesday. They came by Airborne Express and the return address is Memberworks in Omaha, NE...the same as Connections. I'm guessing that even if they aren't using the same website to take the orders, the vouchers are all being sent from the same place.
BTW, they are the "green" ones and expire on May 31, 2005.