About Wi-Fi music sync
You can use Wi-Fi® music sync on your BlackBerry® smartphone to browse songs and playlists that are in your iTunes library on your computer. This feature isn't available for the BlackBerry® PlayBook™ tablet.
You can select songs and playlists that you want to download to your smartphone, and when your smartphone is within range of your Wi-Fi network or when you connect your smartphone to your computer with a USB cable, the songs and playlists are downloaded to your smartphone. You can also create and change playlists and synchronize these playlists from your smartphone to your computer.
Songs and playlists from your computer are synchronized with the Music application on your smartphone. These songs appear dimmed if they have not yet been downloaded to your smartphone. Within the Music application on your smartphone, your Wi-Fi Music Sync list displays the status of your songs and playlists, such as pending or downloaded, as well as the status of your connection with the BlackBerry® Desktop Software.
Your smartphone can only be connected with one computer at a time when using Wi-Fi music sync.