Xilinx is aiming its Zynq-7000 "programmable SoC" platform to imaging and video applications, among other things:
EETimes and XCell Journal articles by Xilinx engineers talks about implementation of digital camera pipeline in general and white balance algorithms with more specifics (don't expect big revelations there):
PRNewswire: Meanwhile, Altera presented its FPGA-based automotive rear view camera, forward looking stereo camera, and radar/camera fusion systems.
Marketwire: Lattice and New Imaging Technology presented HDR camera based on NIT NSC1005 and LatticeECP3 FPGA.
Update: Xilinx published its FPGA reference design documentation based on ON Semi VITA-2000 image sensor.