I'm finishing a new theme for q2a. It is called "Intelligent" and already in use at http://www.schreibgenuss.de/
light and fast
responsive (tablets, smartphones...)
design adapts to the content
As soon as there is an image in the question it becomes the main image of the current website, for instance:
If there is no image, a default image is displayed according to the week day.
Cool thing: Every image (custom or default) is adapting to the screen size =)