1. A script widget. A widget one can use to install a script or scripts in a sidebar with widgets installed in it. This including scripts for plug-ins that use such.
2. Alter the text widget option on the widget configuration page in Presentations so the admin can enter a number, instead of choosing from a list of number that could prove a bit too limited. (Believe me, somebody's going to find a use for more than 9 text widgets.)