I wrote this up for someone in the forum, so I thought I would share it. Who knows.. there may have been one exactly like it already ;)
This plugin will show the last X posts by the current author at the bottom of every post. Using the built-in options page, you can choose the number of posts to show, set the header text, choose to show the post dates, and select the format of the date. It does not list the post currently being viewed of course, and it sorts the posts by date with the newest first.