Jobpress is a very special theme from fabthemes.With this theme you can host your own Job board for free. Registered users can submit job listings on your site and an admin can review and publish it. This theme is WordPress 3 ready with features like Custom menu, custom post types, custom taxonomies, Custom page templates, widgetized sidebar, and it includes 2 custom widgets and theme option page . I have made two screencasts to explain the job listing process.
How to Create a Job submit form Page