Linked Future Posts Widget acts very much like the upcoming posts widget by displaying scheduled posts instead of published ones, but includes a link to each post (using slug/post name). Requires WordPress 2.8+
Use this plugin in conjunction with the Future plugin from Marion Sudvarg to create a Post Grid of scheduled events and a list of scheduled events on the post page. Events that change from scheduled to published status will automatically be removed from the grid and list.
Linked Future Posts Widget is a derivative of the Upcoming Posts Widget plugin created by Aaron D. Campbell.
You can download this plugin here.