This is a port of Angryman's Lavenia theme for the 5/6Gs, so all credit goes to him.
It's not perfect, but I'm pretty happy with it at the moment. I made a few minor changes to suit my taste and the 20G screen. I haven't added his "PAUSED" overlay yet, because it seemed to cover up some of the text when playing a track without album art. If I figure out how to prevent that, I'll update it.
Click the image to download:
See
his original thread for details and more screenshots, I was too lazy to take any more
Update: Now using 91x91 album art, like the original theme.