Just finished a module whose main purpose is to maintain a map of existing Drupal UI form elements responsible for setting or listing something that could be exported to a feature related to its particular features components. It then displays a widget in that place for selecting to which feature this component is intended to belong.
Mainly functional for selecting which variables you want to export to a feature if you don't know which strongarm component that was you changed in the form you just submitted. At this time it works only with Features, but i see possibilities of other uses and the API is capable of that. Selecting whatever in the Drupal UI for other modules.
Your feedback wanted.