Taking a page from Slacker’s book, Internet music service Pandora is augmenting their paid service offerings with ad-supported streaming – think audio commercials. Thus far, home audio hardware (Sonos, Squeezebox) had required a subscription ($36/yr) for service. Now, a free ad-supported Pandora service offering is being made available as an option for the Squeezebox platform. Given the massive number of downloads, and presumably usage, of Pandora’s new iPhone application it’s a safe bet that we’ll see similar service models for mobile devices introduced at some point. Quite a few of us are partaking and Pandora’s got royalties to pay – so I’m fine with them selling (a reasonable amount of) ads or charging me a modest fee for ad-free music.