One day after Insight said it would join cable brethren Comcast, Cox and Time Warner in launching a family tier, the dish heads got into the act, with DirecTV saying it will offer one of 40 channels ($34.99) to its 15mln customers in Apr. The nets on the tier will include many of the usual suspects, plus such public interest and/or niche channels as NASA TV, BYU TV and RFD TV. The tier will also include local broadcast signals. In addition, EchoStar chmn Charlie Ergen will unveil plans today for a similar family-friendly tier when he testifies before the Senate Commerce Committee on indecency. The price-focused EchoStar is expected to make its family tier available to its 12mln subs for about $20.