Ok, well after a little
effort, I do know what you are talking about. A dynamic IP address(1.1.1.1), but
a static host name(1.one.com).Well, since IP addresses are already being used
in a dynamic way, that would work fine as usual. Now, what I see as your proposal,
is to have a static hostname which will point to a different IP every time a user
logs in.
This solution is customer oriented, because it does absolutely nothing
to the IP base, which is the issue.
As for the hostnames, keeping a static hostname
per user would be a hell of a mess for every ISP to handle. If you want a static
hostname, there are non-profit services like dyndns.org which will host a static
hostname for a dynamically connected machine.
ISP's hate this. They see static
hosts or IP's as a way for users to host services of of their computers, which is
usually banned according to their usage policies.