Feature request: add subscription for non-subscribers

From the FAQ:

Can Guest user subcribe author post ?
No, Current version of the plugin will not support for guest user

It would be great if non-subscribers could subscribe – enter their email and get a note whenever their favorite author posts something new.

The email would need an unsubscribe link…

I’ve been looking but haven’t found a plugin that will do this – an unfilled niche for sure! Maybe in a future version?

Chris

http://wordpress.org/extend/plugins/wp-subscribe-author/