Bill,
That a great idea. Just replace the dots in your numeric address with
underscore and make it part of the domain name. 
Then you have
to remember that cnidr is in reston and what their numeric address is.
I hope people recognize friendly sarcasm. No offense intended Bill.
The whole point of a name space is to make things easier to remember.
There is no reason you can't be in two domains. Machines can have
cnames and people can have multiple MX records. You just have to pick
your favorite for the in-addr.
Maybe .com can be split by country that you are incorporated in and in
the US moved under .us and further split by state of incorporation (or
state in which you do primary business for unincorporated businesses
and masquerades). Perhaps in the US we could also do
symbol.stock-exchg.com.us with a requirement that you be listed on
that stock exchange (and maybe even delagated to the exchange),
covering publicly held companies and do privately held companies by
state if neccesary.
There are more problems than just the size of the zone transfer and
the load on a small number of DNS servers. There is also the problem
of distributing the delegation of name space registration. This is
only a problem if you are currently stuck with the job. Maybe someone
from the Internic would care to comment.
Curtis