I have OS5 for Blackberry. This article talks about OS6.
http://techtips.salon.com/music-formats-blackberry-support-2180.htmlI currently use a 32GB card full of MP3s. The music menu supports playlists so M3U I imagine is supported. I've really never had a problem playing anything on a blackberry, video or audio.
Two reasons I want to use the native player:
1. It indexes all the contents of your Micro SD card so you can instantly drill down into, for example, genre (or artist, album, all songs, etc.), and while browsing it retains a search box at the top so you can begin to type in anything, maybe the first letter of an artist you want. Genre is important to me and is my primary browse method.
The "Jam11" app I mentioned does not even have a genre option, and I just know it's gonna be a nightmare. I spoke on the phone today with the developer and...not a nice guy. I also don't like their terms and conditions with regard to privacy, not to mention that their defunk forums are literally full of porn spam and spam of other sorts. He barely speaks english.
2. There are 3 relevant keys on the side and top of the phone that control the native media player regardless of whether the app is visible, and also regardless of whether you have keyguard on. 2 buttons on the side give you vol up and down if pushed and released quickly, while if held down for about .5 seconds they function as next and previous track. I LOVE the economy in this. A button on the top functions as pause/play. So even if I'm doing something entirely different like browsing a webpage, or even if I've got the phone in my pocket with keyguard on, at any moment I have instant ability to squeeze the phone depressing my selection with full control over what I'm listening to.
When you say "we're probably giving it an m3u that points to mp3 files" do you mean it's pointing to the files that are to be streamed from the computer back at home?