I've changed to Blogger's new comment feature, and have apparently lost the ability to comment on old posts. Don't have to time to look into it now, but will see what I can do about migrating the old ones over.
For now I have to deal with a much larger content migration plan... I think the last month of this project is going to prove to be as time consuming (and frustrating) as the first. I'm just glad it's going to be so worth the effort. If all goes right, I'll be cutting my work in half.
Which means I'll only be doing the work of one person.
Until I find something else to take on...