All you have to do is enter your email address (and hope that the folks behind Mailhide aren't doing anything nefarious with it), and reCAPTCHA Mailhide will spit out a URL and some HTML code. Both take you to a page where you have to solve a CAPTCHA test like the one shown above to reveal an email address.
You can either provide a hyperlink to the URL, or embed the HTML code in your page. If you go the HTML route, visitors to your website will see a partial email address that looks something like b...@downloadsquad.com. When they click on the "..." a window will pop up asking them to solve the CAPTCHA. In other words, people don't have to leave your web site to get your email address. They just have to be able to decipher hard-to-read text.
[Thanks rossruns!]
If you've had a blog for any length of time, you've probably been assaulted with blog comment spam. Users of WordPress have the fantastic Akismet spam filtering tool freely available to them by Automattic, the makers of WordPress. But while Akismet is good (really good), it's not perfect. 
