Someone posted this idea before as a comment, but the more I think about it, the better the idea becomes.
I want an easy-to-remember format email address that I can give out manually to people in the real world that becomes associated with a company automatically.
Example: I am in the Gap store and at check-out they ask for my Email address. I want the receipt emailed to me, but I don't want to give out my Gmail. Instead, I tell them "firstname.lastname@example.org" -- that email address, once emailed is given it's own unique Throttle email address that I can then (at a later date) update to be the newly generated address.
Or, I just leave it alone. It would essentially be <username>-<unique identifier>@thrott.com. Easy to remember, Easy to use. Never have to worry about giving out your actual email address.