Long answer, "no."
Sony has not provided any enhancements and since so few people use it as a music player that has not been an area of development among the hackers. Direct page navigation and a clock were more desired features and they received the development time.
One of the great features of the Sony was the extremely long battery life. Often a few weeks between charges. When you play music the battery gets eaten up very fast. I keep no music files on the Sony and have a Creative Zen for my music needs.