I know there is some concern out there right now as the current Dynamics GP VPC and Hyper-V image "time bomb" today. It was our intention to have the new 64-bit Hyper-V out and available today so that this wouldn't have been an issue, but with a couple of technical glitches, and people out on Holiday leave, we're been delayed just a bit.
I'll post on here as soon as it's available, but would assume that it'll be no later than Wednesday end-of-day, as it's already going through the "signing and scrubbing" process. After that, it's just a matter of getting it on PartnerSource.
In the interim - changing the system date on your hardware might help...