Comment on How to Increase Blog Comments by Mark.
Regarding moderating a site, I am playing around with comment filter plugins. You can add a huge list of words that might even slightly be considered race related. These in theory should do the moderation for you.
WordPress 3.0 should be a huge improvement and if you like me run more than one site, I have read something about one admin panel cold control multiple blogs. We will have to see what this means.
About being hack, I do not know if I mentioned it, but another thing I am playing around with is projecthoneypot.org there is even a plugin.
Thanks as always for your clear wisdom regarding WordPress.