Fantastic, and I love these new macros. I love the way you can pull information out of messages, no matter where they are.
Unfortunately, by using the full thread as the basis for my flat board hack, it looks like I'm not going to be able to put "previous topic" and "next topic" links in, because the appropriate macros are necessarily message-dependent and don't work in the page template for the full thread structure.
Maybe I can figure out a javascript way to pull a message number out of the URL to hand off to the msgnum settings.