Does ESX 4.0 or ESXi 4.0 support the built-in virtual machine capabilites in Windows Server 2008?
No, Hyper-V cannot be passed through to a guest.
I wouldn't think so. Hyper-V requires 64bit VT capable CPU's and ESX doesn't expose the VT features to a VM.
Paul
No, Hyper-V cannot be passed through to a guest.