Pictures of the S9's interface are one thing, but seeing it in motion is so much better. A thorough walk-through of the GUI popped up on youtube and it's definitely worth watching:
The interface looks really beautiful. Nice and polished and pretty damn responsive too. The built-in G-sensor (aka accelerometer) seems to work fluidly as well, rotating the screen based on what direction the player is turned. Cowon has even included their own coverflow-esque album art navigation, which looks very nice. Another nice feature is the ability to zoom in on text, whether it's a list of your musc or an ebook you're reading. So far I'm loving what I'm seeing from the S9. It's at the top of our Most anticipated DAP list and I'd be surprised if anything at CES 2009 will take its spot.
Thanks to all that sent this in!