Left of the Dial, which looks to be a 90-minute documentary that will deliver a glowing tribute to the left wing Air America radio talk show service, will debut Thursday night on HBO. The HBO Web site touted how "a group of investors set out to launch a liberal radio network that would challenge the dominance of America's airwaves by conservative talk radio." A synopsis of the documentary recounted how "in the days before launch, the energy picks up amidst a whirlwind of photo shoots, CNN sound bites, the creation of marketing/PR materials, and delivery of the hot-off-the-presses New York...