http://musicbrainz.org/search/edits?auto_edit_filter=&negation=0&combinator=and&conditions.1.field=status&conditions.1.operator=%3D&conditions.1.args=1&conditions.2.field=type&conditions.2.operator=%21%3D&conditions.2.args=90%2C233&field=Please+choose+a+condition

should show all open edits except "add relationship" ones. The results still include add relationship edits.