Diablo Cody (she wrote Juno), is signed on to produce a Sweet Valley High movie. The latest rumor is that it's going to be a musical!
Sweet Valley books were first published in 1983 and have been coming out ever since, with Sweet Valley Confidential published just last year. Your teen librarians grew up on these books; they're an old-school version of Gossip Girl, with blond Californian twins leading the drama. Try Sweet Valley Confidential then scour used book stores or ask a librarian to help you track down the originals!