BuddyPress.org

change_newblog_defaults will remove the default urls from the users blog and instead add a link back to the users BP profile

Save the code below to mu-plugins/change_newblog_defaults.php

<?php

require_once( 'bp-core.php' );

function change_newblog_defaults( $blog_id, $user_id )

{

global $current_site;

switch_to_blog($blog_id);



//--change default blogroll

wp_delete_link(1); //delete WordPress.com blogroll link

wp_delete_link(2); //delete WordPress.org blogroll link

//add a link to the users profile page

wp_insert_link(array('link_name' => __('My Profile', 'buddypress'), 'link_url' => bp_core_get_user_domain($user_id)));

//uncomment the line below if you want a link back to your main site

/*wp_insert_link(array('link_name' => $current_site->domain, 'link_url' => 'http://' . $current_site->domain . $current_site->path));*/

//--end

restore_current_blog();

}

add_action( 'wpmu_new_blog', 'change_newblog_defaults', 10, 2 );

?>

edit: the code above is a modified version of http://mu.wordpress.org/forums/topic.php?id=9369#post-56231