I thought I'd try my hand at a video tutorial about using Captcha with Drupal.
reCAPTCHA is a powerful Captcha system that validates human interaction via a remote server. It's really good for making sure you don't get horrid amounts of spam on your site. The sad thing, however, is that there was no way to use it with Drupal. I read about it on Ben Maurer's blog and instantly began writing the reCAPTCHA Drupal Module.