I *think* I’ve correctly enabled comments now. Zope’s security model was overriding the Blog product’s security that I’d set to allow comments, proving that Zope is indeed a powerful, if mysterious, beast.
My sincere apologies if you’ve attempted to comment in the past, but have been rebuffed by the software gatekeeper. It was poor testing on my part. I hope that you can attempt, and succeed, to comment now, should you so wish.
And if something is still broken, please, drop me a line to let me know.