Mobile CSS and media queries? What is the easiest way to create a mobile stylesheet for a Drupal 6 site? Is there a simple way to just create a css file, declare it in the info file add a viewport meta tag to your templates and have it all be automatically recognized by the site pages? Based on my own attempts, I'm thinking it's a little more complicated than that, but maybe someone has a fairly simple solution...?
Take a look at the Omega base theme.  I haven't used this with D6, but the D7 version handles all of the media queries and makes it pretty easy to customize them via the UI settings page.