As the final act in our saga of expiring VPCs, I'm happy to announce that we've reissued VPCs for VS2008 Beta2 with an updated expiration date.  You can find the updated links on the VS2008 download page:

Thanks to everyone that has helped us get the word out about this situation and please accept our apologies for any inconvenience this might have caused you.  Needless to say, we're taking steps now to ensure that we don't make this particular mistake again.