I modified the database/scripts so that actions performed by end users (subscribing, unsubscribing, updating e-mail address) are recorded in a separate table. The reason behind this update is so that I can keep the e-mail subscription database and the ichaos database synchronized.
The update is a simple INSERT that runs after each list update. The new table (MassEmailManage) has columns for old email address, new email address, action, and list id. I'll manually check it once a week or so to see if any ichaos updates need to be made.
Also, it'll be interesting to see how much activity these pages see.