The Datagrid allows you to establish EDIT options per column.
Currently, Mendix is developing a "dataviewlist" widget. Instead of showing the lines in a datagrid, you'll see several dataviews with editable (and read only) fields. Very useful for questionnaires, scorecards, dynamic data, etc.
We are testing the widget in a current project based on 2.5.1, once it is stable, this widget will be available in the App Store.