CueThat is a slick little browser add-on that lets you add any movie you happen upon while browsing the Web to your Netflix queue. Just highlight a title, right click and choose CueThat from your context menu, and voila: it's added to your list. It even works with movies that are still only screening in theaters.
CueThat is offered as an extension for both Firefox and Chrome, though the bookmarklet works just as well and is usable in any Web browser. It's well worth adding to your bookmark toolbar if you're a Netflix user who hunts for movie reviews or recommendations while browsing the Web.