Lulzbot TAZ 1.0
The "newest" addition to our collection of 3D printers is actually the oldest: The Lulzbot TAZ is actually, a Lulzbot TAZ 1.0 (according to the serial number on the back: KT-PR0010-5147).
The index.html at http://devel.lulzbot.com/TAZ/ says, among other things:
*"B" - KT-PR0010 - TAZ 1.0
Using minicom, the speed was determined to be 115200. Sending
G28 to home it made it grind gears.
$ pronsole offline> connect /dev/ttyACM2 115200 ttyACM2 21°>
Eventually, I found http://download.lulzbot.com/TAZ/1.0/hardware/electronics/RAMBo/ which identifies the board as "based off of the Arduino MEGA" with "5 stepper drivers" and "5 MOSFET switched outputs" with documentation at http://reprap.org/wiki/rambo
As near as I can tell, the latest in firmware and other software lives at http://download.lulzbot.com/TAZ/1.0/software/current/firmware/Marlin/