It's come to my attention that it's not immediately clear what it is you DO in Tunescape. Along with posting a page on the website, I've been putting together a demo Tunescape to go out with the first update.
A big part of the enjoyment of Tunescape is kicking back and just enjoying the experience. There's not much to see yet, since nobody's had a chance to create! As more Tunescapes are made available to download from users who wish to share, viewing will become a much larger part of the application.