For my blogpost http://websupporter.net/blog/de/starter-content-fuer-themes/

starter-content-add-widgets-2.php

<?php
add_action( 'after_setup_theme', 'theme_start_content' );
function theme_starter_content() {

	add_theme_support( 'starter-content', array(
		'widgets' => array(
			'sidebar-1' => array(
				'text_business_info',
				'search',
				array(
					'text',
					array(
						'title' => _x( 'My own title', 'theme-slug' ),
						'text' => _x( 'My own text', 'theme-slug' ),
						),
				)
			),
		),
	) );
}