With the release of 3.1, WordPress enabled list-type admin screen enhancements to provide sortable columns for list-type screens and better pagination.

This begs the question, how do we make our custom columns sortable, too? If we add custom meta attributes to posts or create custom post types, sometimes it’s nice to display these fields in the admin tables. There are plenty of posts out there that describe how do that. So, let’s focus on how to make these columns sortable. More…

I stumbled on a great post about how to custom boxes for your wordpress posts. In this case it was promo boxes, but it could be used anytime you want to relate certain custom types of content to your wordpress pages (for example, a portfolio of work, a list of employees, etc).

http://wordpress.stackexchange.com/questions/5750/custom-field-meta-populated-by-dropdown-of-existing-posts