Nvidia is readying a new GPU this year called the NV48, and previous news reports have pegged it as an AGP-only refresh of the NV40 (GeForce 6800 series) GPU.  However, VR-Zone has reason to believe that Nvidia is also planning a native PCI-Express version of the NV48, and it could be ready for manufacturers (or even retail?) as early as this August.  The NV48 series is expected to be largely similiar to the NV40 and upcoming NV45-based cards, but with the beefed core/memory clock speeds expected of a refresh part.

Meanwhile, XGI still has the PCI Express versions of their Volari V3, V5 and V8 GPUs lined up sometime this year, but in limited quantities depending on consumer demand.  Like Nvidia's initial PCI-E GPU product lineup, these GPU support PCI-E through a bridge solution that converts AGP signals to PCI-E (and likely vice versa).  However, this bridge will be on the PCB itself, not on the package like Nvidia's solution.

VR-Zone writes that native PCI-E GPUs are also in the works for the end of this year over at XGI, and like Nvidia's NV40 these will support Pixel Shader Model 3.0.  These PCI-E solutions will include updated versions of the Volari Duo, which as you may recall is XGI's dual-GPU graphics card productline.  The highest end version of these will reportedly feature 12 pixel pipelines each, for a total of 24 pipelines on the card itself.  Finally, GDDR3 memory is a strong possibility for these high-end cards.