Well I spent the weekend in the shop and got the majority of the slot mortiser built. I got these plans off of Woodgears.ca http://woodgears.ca/slot_mortiser/index.html. I still need to finish the table you clamp your stock onto and the crank and counter mechanism.
It's kind of a neat thing to build as it incorporates mortise and tenon, finger joints and even some cove cutting on the table saw. I used the tenon jig I just built to do the tenons and they were the best tenons I ever did. I didn't even lay them out on the wood. I just measured the width of the tenon and how mich it was from the edge and set the jig accordingly.