WordPress allows us to schedule posts. Especially on community blogs it’s a great point. Write more than one post at once and schedule them, that’s it.
In this story, scheduled posts can be shown on a widget. And wordpress has a widgets api of course. Future Posts Widget just shows draft /scheculed/pending posts in sidebar.
Plugin is available on wordpress.org: http://wordpress.org/extend/plugins/future-posts-widget
Please do not hesitate to contact me for bugs or suggestions.