Can I keep track of how many people subscribed to my site?

I am administrator for a church announcements and blog. Knowing who is and is not on the feed is important to making sure people are getting information. Since many users are fairly computer illiterate, they don't remember what they have or have not done and aren't usually able to figure it out. I really don't want to constantly email help to get a listing. This is something I would check often especially during times of converting emails to announcement feeds. It would be really nice to have a utility that, at the bare minimum, would generate a list of current subscribers. I can see that this would be a bad thing if unprotected. I would suggest that the first email in any feed be the administrator who could then change it if it were the wrong person. Something simple like an email sent to stats@feedmyinbox.com returning a list of subscribers for each person that the sending emailer is administrator for might be an easy system to implement until a full blown system is generated.

eric