There was a small patch submitted to add a background image to Psi's roster. In an effort to do things The Right Way™ I've spent the past couple of days making QListView display a background image using properties similiar to CSS.

This is a glimpse of what I have slapped together at the moment:

Now I just need to kill the flicker with some optimizing and trickery, and clean up the code for this to be ready. I may also try to find a way to throw a background onto any widget.