A scrollable list widget like the ones shown at Check it, don't select it would be a great way to improve the usability of the forms we generate. Checkboxes would perform better than the current drop-downs for multiple selects because they would not require a round trip to refresh the form as you add each element. One could also implement some pretty simple javascript to filter options by the first letter of the value, or add letter heading that show/hide option's grouped by the first letter.

In case you've been wondering what we've been up in terms of improving and enhancing SyntaxCMS, I've put together this overview of new features and fixes we've committed to CVS since the last release.