It was recently brought to my attention that More Than Melchisedech--the third volume of the Devil Is Dead trilogy--is now available as a print-on-demand book from a company called Lulu.
http://www.lulu.com/content/1163389I placed an order already, but apparently there is a 10-15 day processing time, since they actually have to print each book on a case by case basis. This is probably for the best since the delay gives me an opportunity to reread Archipelago and The Devil Is Dead.
This is the best Lafferty news I've heard in several years; hopefully, we'll see lots more p-o-d Lafferty in the future.