I was thinking, a cool way to avoid email harvesters that would work quite well is something like this:
<a href="mailer.php" title="Mail me">Mail me!</a>
Then, in mailer.php, have this:
<?php
header('Location: mailto:email@domain.com');
?>
That way, all browsers would redirect to the mailto link, which would open the mail app. Spammers wouldn’t see the email though, and they wouldn’t add it.
Whatcha think?