I would like to have an option for user-generated themes. I love the idea behind newsblur, but cannot become happy with its interface. A first step to get there could be to provide us (everyone who feels similar) with a zip containing all the css files and little images. Using browser-extensions for restyling could be a first step then. Eventually some screenshots would appear, and if the results are good, hosting the themes and making them accessible through the user preferences might become an option.