Two new System Center Virtual Machine Manager Knowledge Base articles published last week. The first is about a perimeter host communication issue and the second is about an issue you may run into doing P2Vs. 

More info: KB971825 - Perimeter Host communication fails after successful connection with a System Center Virtual Machine Manager 2008 server
KB971816 - Using P2V together with System Center Virtual Machine Manager 2008 may fail with error 3154 (0x8099319E)