Hmm its interesting. Today i publish our mobile version; i coded it with XHTML Basic 1.1 . I put it on subdomain and created a mobile map and submitted to gwt. I point to urls to desktop version from mobile versions' canonical tag. I used similar metatags from desktop version. (2 word added to all title like that: "- mobile version")
I read google guide and i redirect desktop version to mobile version who want access to site on mobile phone. I added 'Googlebot-Mobile' user agent. And i redirected php header method like that desktop to mobile version:
header('Location: http:// mobile.mysite. com/');
Now i'm waiting.