gistfile1.php

// Register our _mobile query variable
add_filter('query_vars', 'sr_mobile_var');
function sr_mobile_var($public_query_vars) {
	$public_query_vars[] = '_mobile';
	return $public_query_vars;
}

// Catch all /m/ requests and rewrite them as mobile
add_rewrite_rule('^m/([^/]*)?','$matches[1]&_mobile','top');

add_filter( 'template_include', 'sr_mobile_template_include' );
function sr_mobile_template_include( $template ) {
 	
	if ( !isset( $wp_query->query_vars['_mobile'] ) )
		return $template;

	// Template path--will eventually use this for testing pages...
	$mobile_template_path = get_stylesheet_directory() . '/mobile/home.php';
	//$mobile_template_path = get_stylesheet_directory() . '/mobile/' . TEMPLATE??? . '.php';

    // Return that path if a readable file exists. Otherwise, return the normal template
	return is_file( $mobile_template_path ) && is_readable( $mobile_template_path ) ? $mobile_template_path : $template;
}