the Ghosts and FDR

 At Readercon the subject of ghosts came up -- I'd given a lecture about New Ghosts in fiction, as advertised herein, where Paul diFilippo and others were in attendance -- and Paul told me about the underground or at least unofficial mania (that's not the right word, what is?) regarding the dead and FDR dimes.  It's going around that if you think of a dead person dear to you, or wish you could talk again to such a person, and if in the next minutes or maybe longer you come upon a dime -- spec...