Drupal module development - How to build admin items list?
I think you have at least two possibilities to proceed.

First, you can use "Views" module to display a list of whatever you want (you can easily configure it to display all contents of a certain content-type that the user currently seeing the page created, etc, etc). You can inspire yourselft with this article about creating an administration page with Views 2 (http://zugec.com/2010/08/create-administration-pages-views-2). It is not very different.

If you want to do it programmatically,  you can always create a "page" that displays whatever you want using hook_menu(). Just set the path under "admin/" and permissions the way you want. Use the page callback function to make the appropriate query (select the nodes you want, created by the current user, order them, sort them, etc...) and to display the results.

If you want more explanations about one of the two solutions provided up there, just ask and I'll develop deeper :-)