some questions which have been asked about CSS possibilities kept me thinking (Martin asked for a 2 Column layout, Tony asked for a small-screen PDA version ...).
Having this principles in mind I have build a model with a XHTML layer, several CSS layers and a small behaviour layer which gives some answers to those questions: Variable Layout. With the "Styleswitcher" on top of the page you can change the layout part of the CSS and you will see how the whole page changes. I see many chances ...
Have fun and please tell me, what you think