Future features are, well, for the future.
Loading time for music is terribly slow. I love being able to listen to mp3's while reading an ebook or writing notes for work, while commuting. It is a battery hog, especially when transferring files to the Visor, and the transfer rate is less than optimal. I takes me close to a half hour to fill the 64mb mmc that I have. The playback quality is great, and I found that if I rip my mp3 at 96kbps, I can store quite a bit more music at minimum sound quality reduction.