Seeing the updae in my messages now, I like that the heraldy is there but now I'm more certain that it would look better next to the name top left as opposed to way off to the bottom right.
I'm hoping, at some point, to make it appear just a little to the right of the signature, as if it were an actual seal affixed there. That's going to take a bit of finagling in the HTML and CSS department, though.
Additionally, does this effect messages from adventurers?
No, though currently (and inadvertently) it does affect out-of-character messages.