There seems to be quite a bit of optimism lately in the realm of digital music and what the future holds for subscription services. So far 2011′s album sales are already up from the previous year, with a big bump from digital, and at least one major label is claiming that they’ve finally figured out “free”. Glassnote artist Mumford & Sons became the third artist ever to sell 1 million digital albums, and even MTV has announced a second O Music Awards show, celebrating music and technology, which is set for October 31st… Spotify was quick to release new user data within only a couple months of launching its service in the U.S., and while they are clearing unclear in terms of paying versus free and how many are U.S.-only as opposed the world-wide, the overall statement is that a lot of people are trying out the service. The announcements in the music arena made during Facebook‘s recent f8 conference also helped boost the outlook of not only Spotify, but a number of other digital music services including MOG, Rdio and iHeartRadio that were also included in the social networks big changes. And while most eyes remain on the Swedish-start up, the competition continues to counter with new moves of their own. Rdio announced this week that it will be launching a free on-demand streaming service, that has no ads, and an unspecified limit on free-listening, which follows a similar move by MOG… Meanwhile, Rhapsody has acquired Napster from Best Buy, in a purchase that will raise the longtime streaming service’s plateauing numbers… Elsewhere, Apple revealed during their press event on Tuesday that its new iCloud service will be extended to Europe, following recent reports that the company was seeking worldwide music rights from labels and publishers… And after only a few months as the new owners of MySpace, Specific Media held presentations for top-level advertisers at Radio City Music Hall on Monday, trying to generate excitement for the site, which will be focused primarily on music and video content. Creative partner and investor, Justin Timberlake (who has also been tapped to play Neil Bogart in an upcoming biopic of the Casablanca Records co-founder) was on hand for the presentations as well.