The music is something I tend to work on through the entire length of the project. I've written music in the past, though it's really not that great. IMHO, music can push a VN from 'good' to 'great' status. I've got a lot of music selected in my library I am planning on using at some point... whether in this project or another. I listen to it at work, while driving... picking out parts and pieces that I want to use. In this vein, I am extremely picky.
Rest assured, there will be music. I just haven't found the right song yet.