notify

Hey friends,

Is there any module or options to make site users to follow or unfollow the taxonomy terms and based on the following terms, I have to send notification if any new post posted on that particular terms. Im using drupal 6.20

Thanks,

Gobi :)

I don't know if my title is really descriptive of what I am trying to say here.

1. Used CCK to crate node type called Announcement
2. Used Views2 to create panel for front page which lists these Announcements
3. I want a user to be able to subscribe (or be notified via email) to any new content of type Announcement

Ideas? I'm guessing there will be many modules involved here.
Here are modules I have installed which could be of use (I figure it's a matter of me not knowing how to use them):
Mime Mail, Simplenews.