There are also Mainboards with onboard Nvidia 9300 or 9400 GPU's. They also support VDPAU.
Hmm, sounds good. I'll search for some of them.
For an AMD 4850e CPU you can use Boards with 8200/8300 GPUs. They are very similar to the 9300/9400 GPUs on Boards for Intel CPUs. VDPAU supports the 8200/8300 GPUs, but there is no official statement whether the codec VC-1 is supported. Some users got it running, it seems. A Board with this GPU will be my next, because there are no 9300/9400 Boards with ATX-Form factor and 3 PCI-Slots.
Gerald