A new NPD Group survey says that if Apple ever does release its rumored cloud music service for iTunes, there will definitely be an audience. Over 25% of iTunes users polled say that they would be interested a free iTunes cloud service. And about half of those would be interested in actually paying $10 a month for services like music sharing and streaming their personal libraries through iTunes. Out of an estimated 50 million users in the US, NPD says that 15 million or so would be interested in a free service, and around 7 or 8 million wouldn't mind paying $10 a month to Apple.
Keep in mind that this is a survey done in May of this year, Apple hasn't even worked their marketing magic on something like this yet, and it doesn't even exist. If a service like that was actually offered, it's not hard to think that word of mouth and/or a well-marketed feature set would drive that audience even higher.
But NPD concludes, not too surprisingly, that there is an audience ready for any iTunes cloud plans that Apple wants to reveal. How 'bout it there, Steve?