@Bas:I didn't read it that way. What's there for only 6 months is unlimited ad-supported streaming, and after 6 months they'll limit the hours ala Spotify.
Edit: From the official web site: "**Free streaming limited to 10/hours momth after 6 months; unlimited with paid subscription. Compatible devices and internet required; ISP fees apply. On TV, Xbox Music is streaming only and requires an Xbox 360 console and additional subscriptions (each sold separately). Some Xbox Music content may not be available via Xbox Music Pass, and may vary over time and by region."