MediaCom’s Jon Mandel gave cable ops some grief on an ad panel yesterday. He noted that the American Assoc of Ad Agencies conference last month was sponsored by AOL, MSN, Yahoo and Google, musing that perhaps that’s why online advertising is exploding, while on demand advertising still hasn’t take off with his clients. "Maybe you guys oughta get your asses out to events like that," he told MSOs. Later, he conceded that he needs MSOs help to better communicate the value of VOD to his clients. — Time Warner Cable’s Larry Fischer says movie trailers on demand are now the MSO’s #1 ad-supported VOD asset-and they only launched 4 weeks ago. Also popular: Driver TV and AOL Music On Demand. TW is launching a vacations/travel VOD channel soon.