AT LONG LAST there's a new girl moving to ``Sesame Street." The hopes of mothers everywhere rest on her little shoulders. Will she be smart? Will she be computer savvy? Will she love sports or play an instrument? Will she explore like Dora or love books like Hermione? What will she teach our daughters about growing up girl in the new millennium? <- snip -> It's true. Abby Cadabby is being sold with gusto in the same way stereotypes are sold everywhere to girls -- as a choice.<- snip -> Girly is more than a type these days, though --...