Spencer,
There is another option...
I am pretty sure you can use Fields to "link" your attributes, but I have not investigated this too far. I have heard of users linking attributes within Titleblocks on different sheets (layouts), ie: change one Field and the others that are linked will update to that value, but again, I haven't done this either.
This may not exactly be what you are looking for but it may point you in the right direction..
I'm just riding the Dynamic Block Band Wagon, and I'm not over the euphoria of how well these new objects work for us.
Hope this helps.
JV