How would you change Cowon's S9 PMP?

Cowon's S9 portable media player had a lot of folks excited -- and understandably so. A bright, expansive AMOLED display. A sleek, curvaceous design. And a codec support list worth drooling over. During our time with the unit, we found the user interface to still be lacking in a few critical departments, though we certainly found a long list of reasons to love it, too. Now that it's been floating around on US soil for a hot minute, we're asking you how you'd tweak it. Are you completely satisfied with the UI? Are there any video formats that have inexplicably refused to play? Is the build quality up to your lofty standards? Let it rip below!