Yesterday I finished the ALU. It is based on BlockandCube's 4-bit PLA adder, and has a throughput of 12 ticks (with 3 ticks of busing, so technically 9). The next component I need to tackle is the registers. I will probably use Nickster258's dual-read registers for the build, if I can't come up with a good design.
I'M BAAAAAAACK!