Howard J. Blumenthal, c.e.o. of Philadelphia’s WYBE-TV, has been named interim executive director of the state-owned New Jersey Network and interim president of its fundraising arm, the NJN Foundation. He will keep the WYBE job as well, NJN said in a clarification. NJN has had temporary top execs since the former e.d., Elizabeth Christopherson, took a foundation job last November. Blumenthal is a former media exec and onetime e.p. of Where in the World Is Carmen Sandiego?