They may well have it. I played Rock Band 2 at Ground Kontrol the week before it came out, and a couple of people from Harmonix were on hand for the event. They seem tight with the pub community.
Yes, I have express permission from HMXSean, HMXCasey, and others from Harmonix to provide this sneak preview, it is definitely tonight at 8PM. We will have all Rock Band 2 songs available including this week's PAX, Freezepop, and Unplugged DLC. Get to Ground Kontrol early to put your song requests in!