Skip, as you correctly point out, the problem is not so great in the case of an organization that operates its own DNS domain, and uses that domain as the means of providing directory service access. Certainly a company like Novell, Lockheed, GTE (oops, Verizon), etc., could easily do so.
But notice some of the problems. I'm not picking on our esteemed co-chair, but
notice that Steve's e-mail address, kent@xxxxxxx, is two corporate mergers
behind the times, since GTE acquired BBN, and then Verizon was formed out
of GTE and Bell Atlantic. But if his certificate were deposited at something like
directory.verizon.com, how would you extract that from the BBN name?
would all of those older e-mail address have to have a set of alias DNS names for
the directory server?