That's good news. I'm a bit confused, though, since it doesn't seem to be the default widget for list:reference fields, which are presented by default in a multiple select widget (or does list:reference not fall under list:<type>?).
Also, the list widget isn't included in the list of available widgets on pp. 372-373 of the 4th edition book. So maybe that Massimo could update that section to include it.
