OK - I got tired of using text with leaders for all of my aligning walls. So I started out to make a neat "stretchy" family to do the trick. It doesn't look like annotation families can be stretchy, though since reference planes are not allowed in the family. Reference lines don't seem to work for this.
Here's what I loaded up. If anyone has a thought, has created something similar that does the job, or can tell me if I'm missing something obvious, please let me know!
It would also be nice to be able to use the Align tool to lock the family to the face of the objects that I'm noting as aligned, but someone else already discovered this won't work right.
Wes