the autocomplete example on the demo page is not working anymore (tested with IE 8 and Chrome 23). In one of the other issues you mentioned that the autocomplete feature is broken with jQuery-UI 1.9.x, but your demo page already uses jQuery Ui 1.9.0!
I have managed to get the keyboard/autocomplete working with jQuery UI 1.8.24.
It would be better to add a note to the Wiki that keyboard autocomplete works with 1.8.24 of jQuery UI only (at least until you manage to get the issue fixed with version 1.9.x).
This is a duplicate of #115, but I've just updated the plugin so the autocomplete extension is working again. Thanks