Pat Finn and Jim Caldwell actually own marketing companies that produce infomercials. Pat's is called In-Finn-ity Direct (his hyphens, not mine), and Jim's is called Future Thunder. I've run a few of their infomercials on my station. I remember one 'mercial where Caldwell got burnt with a laser as they demonstrated how tough some kind of car wax was.
Last time I saw a host do an infomercial, it was Bob Eubanks on a Red Skelton video collection, around the early part of '04.