So, I'd already installed comments, but the links wouldn't appear under the title. I think the problem was related to HaloscanMacro not being defined when BlogPlugin would create the first page, and then failing to update those tiddles.

Well, I've got a solution at last: I copied the integrality of HaloscanMacro directly into the original tiddlywiki source, so it gets defined at startup, and now it works.

I hope that'll get me more comments than I've been getting lately. It's lonely on here.