A direct way of connecting to the hardware itself should not be possible for a merit of reasons. One being that you could interrupt the host in it's working with the hardware.
So I would be suprised if it is done already. If it is done via a driver-hook process I think we could imagion it becoming possible to interact with the PCI slots.
I believe the way the current VGA-drivers of VMware already work with the host VGA-driver like that.
I too would love to see a way we users could interact more with PCI-slots and their inserted cards as it then would be possible to use PCI-cards like TV-cards in VM's.
Intel Smackover x58-chipset
Intel i7 965
6GB DDR3
Radeon HD4870 1GB VRAM (5870 version ordered)
Vista Bus. x64/Windows 7 Ulti x64
VMware Workstation 7.x User
VMware ESXi 3.5.x/4.x Admin