Music-based social networking and Internet radio service recently soft-launched a subscription service, according to

The ad-free subscription service costs $3/month and offers more interactivity. A "full-fledged" subscription service would be available by the summer, according to Martin Stiksel, a founder of Last.FM.

As previously reported, the company recently inked a deal with The Orchard and previously struck similar licensing deals with Warner Music Group and EMI.