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Turned on comments. God help us. The last time I had a blog with comments on it was six years ago and it was a spammy disaster. I hope we fare better here.
Integrating Disqus comments with Octopress is ludicrously easy—simply sign up for Disqus (it's free), then paste your account's short name into
_config.yml in the root of your Octopress directory and...and that's it.
I suppose if you want to do something more you can sign up for Akismet, a similarly-free antispam service. That should help to keep things nice and clean.