Cloverfield . Chinatown . Starship Troopers — don't laugh, it's underrated. Vudu, makers of a $300 set-top box that downloads movies and TV shows, are offering nearly 100 movies for rent at just under a dollar each. The surprise is that these aren't the usual bargain-bin fillers. They're cult classics like The Big Lebowski and techie favorites like Serenity — in short, a great starter library for Vudu's target demographic. I'm worried, though. Giving away your prized possessions? Please tell me Vudu isn't on suicide watch.