I intend to build the rev B bityExpress prototype entirely on my own this time including the 484 pin BGA (Altera FPGA). Since the part is so expensive I decided to practice on a simpler card with a cheaper BGA. The result was a small, 2 layer PCB:
Layer 1 check-plot of bityBGA
I was hoping to use an Altera Max V CPLD like I used on the JTAG programmer, but the only BGA package available at Digikey was $12.00. I found a 56pin BGA Xilinx Coolrunner-II for $1.60. I should get the test board in about two weeks before the bityExpress rev B PCB.