The information in the leaflet is a wee bit cryptic. I wish I had written it. What they are referring to is the RhapPFS capabilities of the Sansa.
When an “account” is applied to the Sansa, meaning that it’s “authorized” using the Rhapsody 4 client, you will gain access to a handful of otherwise hidden features on the device. There’s a new Rhapsody Channels function in the main menu, and you can add tracks from these channels to the device library, or flag subscription tracks for purchase later, via a single button click.
You can venture into a trial subscription with Rhapsody, and cancel before you are billed, easily done via the client. You DON’T need Rhapsody to enjoy the Sansa, unlike the evil marriage of the iPod and iTunes. In fact, Best Buy now promotes Napster (makes sense, since they bought the company) over Rhapsody.
Te wording of the leaflet makes it sound like you need Rhapsody, but this isn’t so. In fact, you can use the Rhapsody client to manage your music, without subscribing. It can also be used to rip your CDs and manage your PC’s music library, instead of Windows Media Player. If you don’t have a Rhapsody account, the client runs off-line- and you CAN use it to purchase music if desired. This mode is pretty cool. You can listen to sample tracks too.