After a bit more looking into it, I decided to go with the Goldilocks pinout instead of what I had previously, so I should be able to mostly just use that board definition. I made one change so that D[0..4] is RXD1, TXD1, SCL, SDA, instead of RXD0, TXD0, RXD1, TXD1 like the Goldilocks has it. For the Rx/Tx LED's, I lose the external timer/counter inputs, the divided system clock output, and the USART0 clock input, but I can live with that, and I cut it down to a DIP-28 footprint, so that's nice. The one unfortunate thing is that there's no way to fit the chip inside a 0.6" wide footprint with room for silkscreen without switching to QFN, and I don't want to do that, but I'll live with missing silkscreen on the middle few pins, and I'll just copy all of the pin names to the bottom silkscreen as well, so at least they're marked somewhere on the board.
