Where can I find a script like they use in Drupal to drag-sort items.
jQuery UI sortable is too simple.
It should be able to work on tables too, not in lists.
And in Drupal taxonomy it’s also possible to take the children’s when you drag the parent + go multiple levels deeper or back.
Example image:

I don’t think something like this exists, how hard is it to make this starting from the jQuery ui sortable?
I found this and it’s close, doens’t work with tables but that’s ok for now:
http://code.google.com/p/nestedsortables/