I would assume so. Limewire, usenet, torrents or where ever else folks get music from. I mainly do my own. Alot of my music is made into FLAC for daily use and the originals are shelved - just a thing I do.....
Try it on your home system or PC (if you have a nice setup). I am not even sure the BB is compatible with FLAC, I have not looked into that - highly unlikely. As I said on the BB its not worth all the extra work vs 256 or 320