Samsung, at it's London event, in which it announced the latest greatest Galaxy device- The Galaxy S3, also announced the addition of the scan and match feature for its Music Hub subscription service. It sounds like it will work by scanning music on your hard drive, and then by making them available to you in the cloud- provided they are in the Music Hub library. Samsung boasts a lot of variety and a pretty decent price plan: 1 device (Galaxy Tab or Phone)- $9.99 a month, or premium at $12.99 where you can have it on up to four Samsung Galaxy devices (phone or tablets) plus PC or Mac.
According to Samsung's website, they are offering Galaxy owners a one month free trial.
The only caveat here is that you need a super cool Galaxy device. Maybe now's a good time to get that new S3?