From their website —
Experience DRM-Freedom: Rhapsody MP3s aren't restricted by DRM. If acronyms aren't your thing, that means; when you buy a song or album from Rhapsody you can do whatever you want with it. Put it on your iPod or any other MP3 player, play it on as many computers as you want, or burn it to a CD as many times as you want.
Naxos has also moved to MP3 -- making audiobooks available in the format, with a huge selection of contemporary and classic titles, Naxos is a great place to get audiobooks.
What does this tell us? Well for one, Audible and iTunes are yet again, deceiving users with their DRM-laden materials. It also shows that more and more people are saying no to Digital Restrictions Management and that existing services are having to adapt to meet those demands.