This post comes to us from contributor Sam Biddle. Right on the heels of the passing of Freda Wright-Sorce comes another loss in radio land. David Haines passed away on July 10th, after 14 years on the air at WPGC helping Washingtonians drag themselves out of bed and keep themselves awake during the morning commute. His emphatic delivery of the news was both an integral part of the Donnie Simpson Show and an institution of…