Hi there!
I'm using foobar now for a while and began developing my first selfmade config for ColumnsUI with PanelStackSplitter/ELPlaylist now. Here's a first look:

It's a very very early version without many of the features I want to add to it - but it plays my music and looks somewhat decent already

Some things I want to add in the future:
- seek- /volumebar with WSH-Panel (and get rid of the menu)
- ratings
- Artwork and lyrics panel (nearly done)
- song info with links to wikipedia etc using foo_run
- some decent album art browser (maybe using GraphicalBrowser)
- some better looking buttons
- mini mode and fullscreen mode
I don't know, when it will be done. Well, maybe I'll share it, if you're interested!
PS: Many thanks to tgpo for the idea to show the album art as the background of playlist groups!