Plumbing-company radio spots gone wild

Out here in L.A., the makers of the radio spots for Mike Diamond Plumbing are layering on the gimmicks like so many well-sweated joints. First came the bizarre suggestion that Mike Diamond’s plumbers are the “smell-good” plumbers: They show up on time and don’t stink of the sewer (until, presumably, they’re done with your job). Then they added a nifty audio mnemonic: a cartoony harp glissando every time they mention the “smell-good” feature. But now (see AdFreak’s constant