For those of who are using the BBM Music app, there is update available today which brings the app version to 184.108.40.206. If you haven't already, you should get prompted to update soon. There is no changelog given this time around, however one thing I noticed was that the first time I loaded it up after updating it gave me a 'Tip' pop-up window on how to best use BBM Music - use WiFi as you may incur charges when using the mobile network, save songs to device for faster loading times.
If you do find anything new be sure to hit up the forums and let us know. Don't forget that you can get up to 6 months free service if you download BBM Music during the month of February.