Still though, filling up blogs with transfer messages seems a bit odd to me.
Me too, and I'm torn there as well. The reason I'm not using transfer memos, other than the active key issue, is that using posts to transfer allows the system to post confirmation messages as replies.
I suppose an alternative to using a new root post for every transfer is to have each person make a single blog post and treat replies to that particular post as transfer instructions. Might work.