search/delete subscribed email addresses in admin interface

I often receive emails from subscribers to me simplenews list that go something like:

My email address has changed. Please remove me@example.com and add you@example.com. Thanks.

I could page through 15000 address in the "list subscriptions" page to find/delete me@example.com, but it would be nice to be able to *search* for an address and view a page of matching results. At present, I've found the fastest way to perform tasks like this is my editing the database through phpmyadmin, which is hardly the safest way to go about things....

-b