This plugin no longer works. In June of 2013, Twitter decided to change their API and make grabbing a single tweet from a user very complicated. Because of this, the code for this plugin is useless. Don’t use it!
In an earlier post I showed how to get your latest tweet on your site without a plugin. It has been an extremely popular post, but for some folks. it was just over their head. I have had quite a few people email me asking to make a simple plugin to accomplish the same task, so that is what I did. I pretty much had all the code already, I just needed to wrap it nicely in to a plugin.
So download it, test it out, and please let me know what you think. If you like it, please post a link to your site that is using it in the comments of this post.