In my particular case we would only need the last, but that's a good point; what if people do want to keep a record of all of their edits, or the last five or whatever? Hm. (I do not have an answer for this, so useless comment is useless.)

I think it would make the most sense to have them as metadata, but on the other hand I think it would flow best going underneath the rest of the entry. I wonder if that's possible?