Default WordPress Configurations Built in Theme

Using the code below, you can allow your theme to set the default configuration for WP. Useful if you use the same theme as a framework a d do a lot of clean website installs.

function set_theme_defaults() {
$o = array(
 'avatar_default'            => 'blank',
 'avatar_rating'             => 'G',
 'category_base'             => '',
 'comment_max_links'         => 0,
 'comments_per_page'         => 0,
 'date_format'               => 'F j, Y',
 'default_ping_status'       => 'closed',
 'default_post_edit_rows'    => 30,
 'links_updated_date_format' => 'j. F Y, H:i',
 'permalink_structure'       => '/%postname%/',
 'rss_language'              => 'en',
 'timezone_string'           => 'America/New_York',
 'use_smilies'               => 0,
 'page_on_front'             => 2,
 'show_on_front'             => 'page',
 'uploads_use_yearmonth_folders'    => '',
 );

 foreach ( $o as $k => $v )
 {
 update_option($k, $v);
 }

 // Delete dummy post and comment.
 wp_delete_post(1, TRUE);
 wp_delete_comment(1);

 return;
}
register_activation_hook(__FILE__, 'set_theme_defaults');

http://new2wp.com/noob/collection-of-WordPress-and-jquery-code-roundup/