Radio Currents for July 14, 2008: The technology, business, people and product news of the radio broadcast industry for the week: Larry Cervon dies at age 86, HD Radio receivers break the $100 price barrier, Arbitron offers the PPM VIP Service, The U.S. Patent and Trademark Office issues a patent to Media Monitors, Foneshow hires Bourke for business development, and Radio Shack recalls power supplies.