Yes, there's a UART on the V2 for remote booting/serial-attached emulated drive. It also includes the "Chuck mod" as a jumper-selectable option, a footprint for a Molex connector, and a jumper to provide power on IDE pin 20. It also supports 256 kbit / 32KB ROM devices.
I have 3 cards that I have been thinking about selling since I am not using them (and could use the cash for other vintage things I want to buy). I have a prototype board, an assembled V1 board and a V1 kit. I'd like to get $50 for the proto, $60 for the kit and $70 for the assembled board. Shipping anywhere in the US would be a flat $6, international shipments would beed to be quoted (since I have no idea how much that would cost).
I'd prefer to sell the 3 cards to 3 separate people, just to keep things fair.