VisMP3 is an alternative to the lackluster built-in music player on the PSP. Although it only supports decoding of mp3 formatted files at this time, VisMP3 offers some important features that Sony could not fit into flash0, namely a media library that organizes mp3s (regardless of folder setup)as well as playlist functionality. Also, as indicated by the name, VisMP3 demonstrates several different types of visualizations for a visual as well as audio experience. The Fireworks visualization is a MUST SEE.