Content Negotiation @ The Autistic Cuckoo

"We have, for some time, tried to inform people about the fact that there is no point whatsoever in using XHTML as long as you serve the documents with a text/html media type. For those who still want to use XHTML and gain at least something for some users, we have recommended content negotiation. On several occasions people have asked us to publish a write-up on how to do that, but there hasn't been time to sit down and write it. Now, finally, we have tried to whip something together that we hope can serve as a guide."