Hi There,
we need a module for joomla 1.5 which fulfills the following needs:
The super administrator will open a list with several points. Every point is supposed to have a checkbox in front which can be checked by logged in frontend users. As soon as one user checks the box and presses the submit button, it is greyed out (and checked) for other users.

Super administrator and the user that checked the box should be able to uncheck it.

An example would be a "to do list" for employees where every employee can check what he has done.