First thing's first - finding a UART.

Thankfully, this was fairly simple for me. I have an oscilloscope and a FTDI board, so I poked around with the scope until I found something that looked like serial, then plugged in my FTDI. Bingo, we get boot text from a nasty proprietary bootloader (that I suspect MIGHT be based on redboot) followed by Linux 2.6 coming up. The pinout is attached to this project as an image. No console though, so I'll have to look elsewhere for getting in...