Want your friends to marvel at your incomparably fabulous taste in music? iLike (which you can find here on Facebook and here on MySpace) not only lets you add snippets of your favorite songs to your profile, but also alerts you to upcoming concerts, new releases and other events from artists you list. To compare your musical savvy with that of others, you can take the iLike "music challenge" and see how you rank. You can even take the quiz based on your preferred genre ranging from hip-hop to country. iLike is the surprisingly rare add-on application that combines several useful features in one elegant package. We wish more apps would follow iLike's tune.