So I just looked and the S1 section of the Audi.de website is live. I'm pretty sure there's no S1 section to the configurator yet, but the mix of high-res photos plus a single video, a PDF consumer catalogue, etc. make for a great way to further check the car out before Geneva.
I ran a story about it on our blog. Find it here, with links to the PDF catalogue and also direct to the S1 section of the Audi.de German language consumer site.