Harmonix Announced on March 20th, that sometime this week, they will add an in game shop for people to buy additional tracks for Rock Band. The store will allow gamers to shop from the main menu of Rock Band instead of going to the dashboard. The shop includes previews to the tracks before you buy. Players can organize the tracks by artist, genre, difficulty, or release year. Tracks will also include difficulty ratings for each instument, so if you want a challenge on drums or a easy time on bass, you’l know what to buy.