since we can download mp3 ringtones and all that, has anyone actually used their phone as an mp3 player also... (do they have a program written that has an actual mp3 GUI?)
Depends on what device/handheld software version you've got. The Pearl (8100) was the first device to include a media application which allows you to play music files (e.g. MP3, AAC, etc.). Also the newest versions of the Dssktop Manager v4.2.2 has some media sync capabilities.