You know Steve, a standard JAMMA supergun won't work on that board as the edge connector is not JAMMA.  You will need a custom connector for it, which actually isn't custom but just not JAMMA.  All superguns are pretty much JAMMA.
That said I'm all over this thing.  I have a PC Engine arcade setup that I don't know if it's official nor have I ever tested it.  I need to get on that.  It's just a PCE with a timing board and some other salad on it.
Well, it was fun while it lasted, folks. Unfortunately, our top bid was way too low:
	dragsy 	           US $255.00 	Sep-19-05 
	arcadecollecting  	US $250.00 	Sep-19-05 
	stevek666 	        US $150.00 	Sep-17-05 
Now, I figured that our budget wouldn't allow us to get this item, but I was still hopeful that we'd get lucky. You know -- it's the same feeling you get when you buy a lottery ticket: "I 
know I have no chance of winning, but I could 
possibly win, so I'll cling to that improbable possibility and enjoy the ride".
That said, wouldn't it be nice if "dragsy" turned out to be Sunteam_Paul! I don't think we're going to be so lucky, unfortunately.