@ the OP >
That post is somewhat dated.
The URL to the only plugin Ive seen is actually on my blog in one of the related posts and that plugin is dated as well, but may still work.
Unrelated to the plugin, I should tell you that youre worrying about the wrong thing.. If we are talking about the WordPress blog in your signature you really ought to be worried about upgrading.
The current version youre using has quite a few vulnerabilities, and most of those have exploits available in the wild.
I reccommend 2.0.7