The yap.tv interface is based loosely on a familiar TV Guide but with a more visual appeal. The iPad and iPhone app are elegantly done and familiar to anyone who has used an Apple app. The app and service are free as yap has opted for an ad-supported model. Actually the advertising could be appealing to both advertisers and users, as ads can be highly targeted based on the user's viewing patterns. You can discover products and other TV shows that are likely to be of interest to you because yap.tv knows what you watch, and what your friends like as well.
Apple fans will be interested to know that yap.tv has Apple founder Steve Wozniak on the Yap team, which means Yap.tv is one to watch. As its population grows, and more users come online, yap.tv becomes even more useful.