Hi Dave!
Let me start off with thanking you for the great blog! I know you cannot cover everything, and that no one can please all tastes.
However I would like to suggest that you do an episode regarding the PCB layout of a modern mixed signal design. Let's say interfacing an FPGA with a high speed ADC for instance. Your take on the layout of 16 lines of LVDS pairs , FPGA breakout and decoupling, and most importantly on how to best handle digital and analog ground issues would be very nice to hear.
You once did an FPGA layout episode which was very very nice. This episode could be a sequel to that in some way
Regards