I updated the schematics for the forthcoming rev2 PCB with a PR8210 interface (designed by Warren). I also made a surface-mount part for a 16-bit LED driver but I haven't hooked it up yet on the schematic.
Rev 2 is getting closer to being sent off for production. We barely have enough pins on the ATMega324P to handle everything we want to do. Now the biggest obstacle is space on the PCB itself.