Bad news if you enjoy Last.fm on your "iPhone, Android device, Logitech Squeezebox, Sonos system, Revo AXiS, Ikon, Domino or Heritage device, Roberts Stream 63i, 205, Colourstream and 83i radios, Teufel machine, Onkyo AV receiver and Denon and Marantz AV receivers"--your Last.fm will now require a subscription service.

Good news though if you use Last.fm on Windows Phone 7 and Xbox--it's still free for our side. Oh snap.

Yes, as it turns out Last.fm is switching their ad-based revenue system in for a paid, monthly subscription one. From the Last.fm blog Matthew Hawn, Last.fm's VP of products said:

On the Last.fm website an ad-supported, free-to-listeners model is what supports our online radio services in the US, UK and Germany. In other markets and on emerging mobile and home entertainment devices, it is not practical for us to deliver an ad supported radio experience, but instead, we will migrate to what we believe is the highest quality, lowest cost ad-free music service in the world.

Subscriptions will run $3 a month and you non-MS folk can sign up here. Regarding Windows Phone 7 and Xbox, Hawn said:

Last.fm Radio will remain free on the Last.fm website in the US, UK and Germany and for the US and UK users of Xbox Live and Windows Mobile 7 phones (through 2011). We’ll also continue to offer radio for free via the Last.fm desktop app.

No word on the exact reason as to why Microsoft services are unaffected, but we imagine MS has some deal behind doors allowing the exception. Hey, it's our win.

Source: Last.fm blog; via: Know Your Mobile, Pocket-lint