A mostly visual update to Avrrrinator Rev. A has been pushed to its repository.
There isn’t much to update with a straight Bus Pirate (3) to AVR ISP breakout, so the changes are mostly visual. A new BOM part now allows mating directly to the Bus Pirate 3, so check that out too.
As before, you can do as you like with this board under the CC0 Public Domain license.