I love Instapaper. I use it every day, and it’s kindle integration has dramatically changed the way I read and enjoy content from the web.
This is what Instapaper looks like you log in:
I spent an hour or two imagining how I might improve things without any fundamental changes to the layout, typography, colors and stripped back philosophy (click for full size):
New icons are in SVG format and the design could be implemented without a single image.