Mobile Usage Becoming a Subscriber Feature, the music streaming service that uses social tagging to find custom-tailored tunes, will be requiring that users of the iOS/Android/etc. apps pay $3/month for a premium subscription. I have found it convenient to listen to on my iPod on more than one occasion, so this is a little disappointing.

Microsoft says that they plan to subsidize for Windows Phone 7 and Xbox so their users will not have to pay the subscription.

This change will go into effect on February 15.

Free service on mobile devices turning into subscriber-only feature [Ars Technica]