My update is that I purchased one the day it came out and I've been communicated more times about buying one after the fact than I've been communicated to about anything else in the past 10 years. They should save the stamp, they already got me to buy one lol.
On a serious note, I for one haven't heard anything. Dan mentioned that these will on the exterior of the building so, if true, they will probably just assume people will walk up and look on their own. Not sure what else they are planning, but it would be nice to offer purchasers of a brick a separate, private tour of the practice facility and/or a meet and greet with some players. Neither would cost anything.