I read the article on using Throttle with old subscriptions. I have a different slant to it. I get the deal about starting from scratch with a new e-mail address. However, some subscriptions/sites use the email address for multiple purposes, some of which are more "permanent." For example, sites that might generate a software registration code.
I would really like the ability to, say, setup a Gmail rule to forward the mailers/newsletters etc to Throttle but keep my email address more "pristine" and human-usable.
I love the service thus far, though!