The eswitch is not yet wired, but is easy to wire, it just connects to 2 of the connectors on the multifunction card as do the limit switches and the enable switch.
I beleive you can use the Xylotex board to connect it as the provide terminals on the card for the unused parallel port lines, but by doing everything through the multifunction card it gives you the benefit of optoisolation from the PC.
The E-stop will (and I believe should) just stop the router and electronics as I don't want the machine moving if I hit the estop in case I am hitting it because I am all caught up in the machine
My router will be hooked into the multifunction card which has a solid state relay built into it. You can see details of the card here
http://www.cnc4pc.com/Multifunction_CNC_Board.htmhttp://www.cnc4pc.com/Multifunction_CNC_Board.htm