These are interesting problems, and we've certainly had a few debates at the Telehash meetups about the meaning of "identity" and such. Hashnames aren't expected to be human-friendly. Ultimately, I think it's a problem to be solved at a higher layer than Telehash.

Telehash is an online protocol, in much the same way that IP is an online protocol, so message store-and-forward isn't in scope. However, such a system could be built on top of Telehash. In fact, developing the design for just such a system has been on my mind quite a bit lately. ;)