Samizdata - 5:30 pm on Nov 16, 2010 (gmt 0)
Why go to the trouble of making a mobile site if you won't allow it to appear in the mobile index?
Google's mobile search - [m.google.com...] - is very different to the normal SERPs.
It uses a mobile Googlebot that consults a mobile sitemap (submitted via Webmaster Tools)
The idea is to rank the main site and mobile site separately.