There is info here:
http://pc.mtld.mobi/community/content_devforum.html
They offer a template. If you look you will see they are .xhtml files so you would have index.xhtml. If you use firefox or opera or a cellphone, you can see a little landing page I made at phonecard.mobi. It validates perfectly:
http://validator.w3.org/
But the site doesn't work in IE. IE treats it as a downloadable file. Tried to fix that via the htacess file and it broke everything so I changed it back.
There are some differences - basically you need a fast loading small site with some minor things like numbers with the links etc.
It needs to validate as xhtml mobile 1.0. I tried with html at first and it invalidated.
here is the guide:
http://pc.mtld.mobi/documents/dotmo...per_Guide3.html
some sites:
http://demo.mtld.mobi/