sentences:  In 2007, he joined forces with digital media artist Lori Munro and NASCAR writer Dennis Michelsen in the purchase of RaceTalkRadio.com.The network has grown since 2007 from a web site hosting one Internet radio show to the nation's largest independent Internet radio network dedicated to racing.Racing programs include shows hosted by SPEED TV's Bob Dillner, XM Radio's Joe Castello and NASCAR Driver Greg Biffle.