how to display part of a menu tree?

Question

I\'m trying to deal with Wordpress 3.0. It\'s rather cool thing but I can\'t get on with one problem. For example, I have such menu tree. Menu tree is constructed from pages

Answer 1

mac joost's answer is great, but I would add that if you want the parent item to print, then you shouldn't unset the parent, so line 18 needs to be adjusted accordingly:

    if($item->object_id != (int)$args->start_in) { unset($sorted_menu_items[$key]); }