Sling Media has expanded beyond its original trendsetting device and now offers several different models, including the new Slingbox AV, which works with any DVR, cable, or satellite set-top box. Although the primary application for a Slingbox is remote TV viewing -- perhaps at a vacation house, an airport lounge, or a far-flung hotel -- it can also be handy inside the house if you have a Wi-Fi network, letting you watch favorite programs in your bedroom or keep up with a ballgame out on the deck.