I work in a department responsible of user support for a software my company use. The supplier of the software have an Idea solution where users can enter an idea and other users can vote for or against the idea. Users can also add comments. The Idea has a status of Received, Under consideration, Planned, Implemented or Rejected.
If this was implemented we could easily see what ideas are allready placed before we place our own and we could see the vote count, comment and status of the ideas.
To place an Idea, the user would need to place it under categories to make it easy to find them.