In template, get name of multisite?

I can probably get away just taking the URL and cutting it down to parts. But is there a WP function to get the multisite ID or name?

Also, I’ve made my own menu to fit my self made theme:

if(function_exists("wp_pages_nav")) {
	print_r(get_children());
	if($post->ancestors[count($post->ancestors)-1]) {
		$child_of = $post->ancestors[count($post->ancestors)-1];
	} else {
		$child_of = get_the_ID();
	}
	if(is_home() OR get_the_ID() == 2) { //2 = SMC:s huvudmeny
		$menu = wp_list_pages("echo=0&child_of=2");
	} else {
		$menu = wp_list_pages("echo=0&child_of=".$child_of."");
	}
	$menu = str_replace('<li class="pagenav">Pages<ul>', '', $menu);
	$menu = substr($menu,0,-3);
	print $menu;
}

Problem I have is that when under a multisite, the “wp_pages_nav” function doesn’t seem to understand what pages to list? I’ve tried adding “child_of” manually and picking an ID, but since it’s a multisite, I have no proper “parent” ID for the menu function.

What should I do?