''That poor son-of-a-bitch ain't ever gonna be the most famous guy from Hoboken,'' Frank Sinatra allegedly once said of ''Joey Pants'' (Joe Pantoliano), who's nevertheless made a name for himself with roles in ''Memento'' and ''The Sopranos.'' Not that you'll read much about his acting career in Who's Sorry Now: The True Story of a Stand-Up Guy. Instead, the memoir recounts his rough-and-tumble New Jersey upbringing by a ''bona fide threesome'': Mary ''Mariacella'' Centrella (whom he still calls ''Mommy''), a ''part-time bookie, full-time seamstress, and interminable gambler''; Dominique ''Monk'' Pantoliano, her husband and ''personal and portable punching bag''; and Mary's third cousin, Florio ''Florie'' Isabella, a Genovese crime-family associate and ''the sweetest wiseguy I ever knew.'' ''Who's Sorry Now'' makes you wish he'd write as frank a book about Hollywood as he has about Hoboken.

