Research In Motion, a.k.a RIM, has published details about their new BBM Music service today.

According to their press release, this new Blackberry Messenger based music service will feature over 45 million recordings from major labels Universal Music Group, Sony Music Entertainment, Warner Music Group and EMI, which will be made available via a cloud service to Blackberry users in Australia, Canada, Colombia, France, Germany, Indonesia, Italy, Malaysia, Mexico, Netherlands, Saudi Arabia, Singapore, Spain, Thailand, Turkey, UAE, the United Kingdom and the United States.

This Omnifone powered service will allow users to access 50 songs for US$4.99 a month but is currently in beta testing, with a limited amount of users.